Document:

EX-4.2

 Exhibit 4.2 

FIRST SUPPLEMENTAL INDENTURE 

FIRST SUPPLEMENTAL INDENTURE (this “First Supplemental Indenture”), dated as of
November 10, 2020, among Acuity Brands Lighting, Inc., a Delaware corporation (the “Company”), Acuity Brands, Inc. (the “Parent Guarantor”), ABL IP Holding, LLC, a Georgia limited liability company (the
“Subsidiary Guarantor” and, together with the Parent Guarantor, the “Guarantors”), and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”). 

W I T N E S S E T H 
 WHEREAS,
the Company has heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of November 10, 2020; 

WHEREAS, Sections 3.01(f) and 9.01(f) of the Indenture provide that the Company may, from time to time and in accordance therewith, add
guarantees with respect to the Securities; 
 WHEREAS, Section 9.01(e) of the Indenture provides that the Company may, from time to
time and in accordance therewith change or eliminate any of the provisions of the Indenture, provided that any such change or elimination shall become effective only with respect to Securities not outstanding at the time of the execution of such
supplemental indenture; and 
 WHEREAS, the Company intends to issue, pursuant to the Indenture, a series of Securities designated as
“2.150% Senior Notes due 2030” with an initial aggregate principle amount of $500,000,000.00 (the “Initial Notes”), subject to the Company’s right from time to time, without giving notice to or seeking the consent of
the holders of the Initial Notes, to issue an unlimited amount of additional Securities having the same terms as the Initial Notes other than the issue date, issue price and the payment of interest accruing prior to the issue date of the additional
Securities, or the first payment of interest following the issue date of such additional Securities (such additional Securities, the “Additional Notes” and, together with the Initial Notes, the “Notes”);
provided that if such Additional Notes are not fungible with the then-outstanding Notes for U.S. federal income tax purposes, the Additional Notes shall have a separate CUSIP number. 

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this First Supplemental Indenture
without the consent of Holders of the Securities. 
 NOW, THEREFORE, in consideration of the foregoing and for other good and valuable
consideration, the receipt of which is hereby acknowledged, each Guarantor and the Trustee mutually covenant and agree for the benefit of each other and the equal and ratable benefit of the Holders of the Securities as follows: 

1. CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the
meanings assigned to them in the Indenture. 
 2. GUARANTEES. Each of the Guarantors hereby fully,
unconditionally and irrevocably guarantees to each Holder of the Securities and to the Trustee the full and punctual payment when due, whether at maturity, by acceleration, by redemption or otherwise, of the principal of (and premium, if any) and
interest on the Securities and all other obligations of the Company under the 

  
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Indenture (all the foregoing being hereinafter collectively called the “Obligations”). Each of the Guarantors further agrees (to the extent permitted by law) that the Obligations
may be extended or renewed, in whole or in part, without notice or further assent from it under the terms of the Indenture, and that it shall remain bound under this First Supplemental Indenture notwithstanding any such extension or renewal of any
Obligation. 
 Each of the Guarantors waives, to the fullest extent permitted by law, presentation to, demand of payment from and protest to
the Company of any of the Obligations and also waives notice of protest for nonpayment. Each of the Guarantors waives, to the fullest extent permitted by law, notice of any default under the Securities or the Obligations. The obligations of each of
the Guarantors hereunder shall not be affected by: (a) the failure of any Holder to assert any claim or demand or to enforce any right or remedy against the Company or any other person under the Indenture, the Securities or any other agreement
or otherwise; (b) any extension or renewal of any thereof; (c) any rescission, waiver, amendment or modification of any of the terms or provisions of the Indenture, the Securities or any other agreement; (d) the release of any
security held by any Holder or the Trustee for the Obligations or any of them; or (e) any change in the ownership of the Company. 

Each of the Guarantors further agrees that the Guarantees herein constitute guarantees of payment when due (and not a guarantee of collection)
and waives any right to require that any resort be had by any Holder to any security held for payment of the Obligations. 
 The obligations
of each of the Guarantors hereunder shall not be subject to any reduction, limitation, impairment or termination for any reason (other than payment of the Obligations in full), including any claim of waiver, release, surrender, alteration or
compromise, and shall not be subject to any defense of setoff, counterclaim, recoupment or termination whatsoever or by reason of the invalidity, illegality or unenforceability of the Obligations or otherwise. Without limiting the generality of the
foregoing, the obligations of each of the Guarantors herein shall not be discharged or impaired or otherwise affected by the failure of any Holder to assert any claim or demand or to enforce any remedy under the Indenture, the Securities or any
other agreement, by any waiver or modification of any thereof, by any default, failure or delay, willful or otherwise, in the performance of the Obligations, or by any other act or thing or omission or delay to do any other act or thing which may or
might in any manner or to any extent vary the risk of each of the Guarantors or would otherwise operate as a discharge of the Guarantors as a matter of law or equity. 

Each of the Guarantors further agrees that the Guarantees herein shall continue to be effective or be reinstated, as the case may be, if at
any time payment, or any part thereof, of principal of (and premium, if any) or interest on any of the Obligations is rescinded or must otherwise be restored by any Holder upon the bankruptcy or reorganization of the Company or otherwise. 

In furtherance of the foregoing and not in limitation of any other right which any Holder has at law or in equity against any of the
Guarantors by virtue hereof, upon the failure of the Company to pay any of the Obligations when and as the same shall become due, whether at maturity, by acceleration, by redemption or otherwise, each of the Guarantors hereby promises to and shall,
upon receipt of written demand by the Trustee, forthwith pay, or cause to be paid, in cash, to the Holders an amount equal to the sum of (i) the unpaid amount of such Obligations then due and owing and (ii) accrued and unpaid interest on
such Obligations then due and owing (but only to the extent not prohibited by law). 

  
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 Each of the Guarantors further agrees that, as between itself, on the one hand, and the
Holders, on the other hand, (i) the maturity of the Obligations guaranteed hereby may be accelerated as provided in the Indenture for the purposes of the Guarantees herein, notwithstanding any stay, injunction or other prohibition preventing
such acceleration in respect of the Obligations guaranteed hereby and (ii) in the event of any such declaration of acceleration of such Obligations, such Obligations (whether or not due and payable) shall forthwith become due and payable by
such Guarantor for the purposes of these Guarantees. 
 Each of the Guarantors also agrees to pay any and all reasonable costs and expenses
(including reasonable and out-of-pocket attorneys’ fees) incurred by the Trustee or the Holders in enforcing any rights under this First Supplemental Indenture.

 3. RELEASE OF GUARANTOR. The Guarantee of the Subsidiary Guarantor
shall be released: 
  

	 	a.	 in connection with any sale, assignment, exchange, transfer, conveyance or other disposition of all or
substantially all of the properties or assets of the Subsidiary Guarantor (including by way of merger, consolidation, amalgamation or otherwise) to a Person that is not (either before or after giving effect to such transaction) the Parent Guarantor
or a Subsidiary of the Parent Guarantor; 

  

	 	b.	 in connection with any sale, assignment, exchange, transfer, conveyance or other disposition of Capital Stock
of the Parent Guarantor by way of merger, consolidation, amalgamation or otherwise after which the applicable Guarantor is no longer a Subsidiary of the Parent Guarantor; or 

 

	 	c.	 upon defeasance or satisfaction and discharge of the indenture as provided below under Article 4 of the
Indenture. 

 In the event of a release in accordance with the foregoing paragraphs, the Company shall promptly thereafter
deliver written notice of such release to the Trustee. 
 4. NO SUBROGATION.
Notwithstanding any payment or payments made by the Guarantors hereunder, none of the Guarantors shall not be entitled to be subrogated to any of the rights of the Trustee or any Holder against the Company or any collateral security or guarantee or
right of offset held by the Trustee or any Holder for the payment of the Obligations, nor shall any of the Guarantors seek or be entitled to seek any contribution or reimbursement from the Company or any other Guarantor in respect of payments made
by such Guarantor hereunder, until all amounts owing to the Trustee and the Holders, by the Company on account of the Obligations are paid in full. If any amount shall be paid to any of the Guarantors on account of such subrogation rights at any
time when all of the Obligations shall not have been paid in full, such amount shall be held by such Guarantor in trust for the Trustee and the Holders, segregated from other funds of such Guarantor, and shall, forthwith upon receipt by such
Guarantor, be turned over to the Trustee in the exact form received by such Guarantor (duly indorsed by such Guarantor to the Trustee, if required), to be applied against the Obligations. 

  
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 5. DISCHARGE OF LIABILITY ON
NOTES; DEFEASANCE. The following provisions shall be deemed to replace in its entirety Article 4 of the Indenture with respect to the Notes and shall be incorporated into the Indenture with respect to
the Notes: 
 Section 4.01 Discharge of Liability on Notes; Defeasance. (a) Subject to Section 4.01(c), the Company and
the Guarantors may terminate their obligations under the Indenture, when: 
  

	 	(i)	 Either: 

  

	 	a.	 all the Notes that have been authenticated and delivered have been delivered to the Trustee for cancellation;
or 

  

	 	b.	 all the Notes issued that have not been delivered to the Trustee for cancellation have become due and payable
or will become due and payable at their Stated Maturity within one year (“discharge”) or are to be called for redemption within one year under arrangements satisfactory to the Trustee for the giving of notice of redemption by such Trustee
in the Company’s name and at the Company’s expense, and the Company has deposited or caused to be deposited with the Trustee sufficient funds to pay and discharge the entire Debt on the Notes to pay principal (and premium, if any),
interest and any additional amounts; 

  

	 	(ii)	 The Company has paid or caused to be paid all other sums then due and payable under the Indenture; and

  

	 	(iii)	 The Company has delivered to the Trustee an Officer’s Certificate and an Opinion of Counsel stating that
all conditions precedent under the Indenture relating to the satisfaction and discharge of the Indenture have been complied with. 

(b) Subject to Sections 4.01(c) and 4.02, the Company or any of the Guarantors at any time may terminate (i) all of their obligations
under the Notes and the Indenture relating thereto (“legal defeasance option”) or (ii) its obligations under Sections 7.02, 7.04, 8.03, 8.05 10.08 and 10.09 and the operation of Sections 5.01(d) and (h) (“covenant
defeasance option”). The Company and any of the Guarantors may exercise the legal defeasance option notwithstanding a prior exercise of the covenant defeasance option. 

If the Company or any of the Guarantors exercises the legal defeasance option with respect to the Notes, payment of the Notes may not be
accelerated because of an Event of Default. If the Company exercises the covenant defeasance option, payment of the Notes may not be accelerated because of an Event of Default specified in Sections 5.01(d) (only with respect to the covenants
terminated pursuant to Section 4.01(b)(ii) above) or 5.01(h). 

  
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 Upon satisfaction of the conditions set forth herein and upon request of the Company, the
Trustee shall acknowledge in writing the discharge of those obligations that the Company terminates. 
 (c) Notwithstanding Sections 4.01(a)
and 4.01(b) above, the Company’s obligations in Sections 3.04, 3.05, 3.07, 10.02, 10.03, 10.04, 10.05 and Article 6 shall survive until the Notes have been paid in full. Thereafter, the Company’s and the Trustee’s obligations in
Sections 6.07 shall survive. 
 Section 4.02 Conditions to Defeasance. The Company may exercise its legal defeasance option or
its covenant defeasance option with respect to the Notes only if: 
 (1) the Company or the Guarantors irrevocably deposits or causes to be
deposited with the Trustee as trust funds for the purpose of making the following payments, specifically pledged as security for, and dedicated solely to the benefit of the Holders: 

 

	 	(i)	 money in dollars or in such foreign currency in which the notes are payable in at stated maturity;

  

	 	(ii)	 non-callable Government Obligations; or 

 

	 	(iii)	 a combination of money and non-callable Government Obligations,

 in each case sufficient without reinvestment, in the written opinion of a nationally recognized firm of independent public accountants
to pay and discharge, and which shall be applied by the Trustee to pay and discharge, the principal of (and premium, if any) and interest on the outstanding Notes on the day on which such payments are due and payable in accordance with the terms of
the Indenture and of the Notes. 
 (2) in the case of the legal defeasance option, the Company shall have delivered to the Trustee an Opinion
of Counsel stating that (A) the Company and the Guarantors have received from, or there has been published by, the Internal Revenue Service a ruling, or (B) since the date of the Indenture there has been a change in the applicable federal
income tax law, in either case to the effect that, and based thereon such Opinion of Counsel shall confirm that, the Holders shall not recognize income, gain or loss for federal income tax purposes as a result of such deposit and defeasance and
shall be subject to federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such deposit and defeasance had not occurred; 

(3) in the case of the covenant defeasance option, the Company shall have delivered to the Trustee an Opinion of Counsel to the effect that the
Holders shall not recognize income, gain or loss for federal income tax purposes as a result of such deposit and defeasance and shall be subject to federal income tax on the same amounts, in the same manner and at the same times as would have been
the case if such deposit and defeasance had not occurred; 

  
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 (4) no Event of Default or event with which notice of lapse of time or both would become an
Event of Default with respect to the Notes has occurred and is continuing at the time of such deposit; 
 (5) such legal defeasance or
covenant defeasance shall not cause the Trustee to have a conflicting interest for the purposes of the Trust Indenture Act with respect to any of the Company’s or the Guarantors’ securities; 

(6) such legal defeasance or covenant defeasance will not result in a breach or violation of, or constitute a default under, the Indenture or
any other agreement or instrument to which the Company or the Guarantors are a party, or by which the Company or the Guarantors are bound; 

(7) such legal defeasance or covenant defeasance will not cause any securities listed on any registered national stock exchange under the
Exchange Act to be delisted; 
 (8) such legal defeasance or covenant defeasance will be effected in compliance with any additional terms,
conditions or limitations which may be imposed on the Company or the Guarantors in connection therewith; and 
 (9) the Company has delivered
to the Trustee an Officer’s Certificate and an Opinion of Counsel stating that all conditions precedent with respect to such legal defeasance or covenant defeasance have been complied with. 

Before or after a deposit, the Company or any of the Guarantors may make arrangements satisfactory to the Trustee for the redemption of any
Notes at a future date in accordance with Article 11 and any redemption provisions contained in any supplemental indenture relating to such Notes, which shall be given effect in applying the foregoing. 

Section 4.03. Application of Trust Money. The Trustee shall hold in trust money or Government Obligations deposited with it
pursuant to this Article 4. It shall apply the deposited money and the money from Government Obligations either directly or through the Paying Agent as the Trustee may determine and in accordance with this Indenture to the payment of principal of
(and premium, if any) and interest on the Notes. 
 Section 4.04. Repayment to the Company. The Trustee and the Paying Agent
shall promptly turn over to the Company or the Guarantors upon written request any excess money or securities held by them at any time. Subject to any applicable abandoned property law, the Trustee and the Paying Agent shall pay to the Company or
the Guarantors upon written request any money held by them for the payment of principal or interest that remains unclaimed for two years after the date of payment of such principal and interest, and, thereafter, Holders entitled to the money must
look to the Company or the Guarantors for payment as general creditors. Any unclaimed funds held by the Trustee pursuant to this Section 4.04 shall be held uninvested and without any liability for interest. 

  
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 Section 4.05. Indemnity for Government Obligations. The Company or any of the
Guarantors shall pay and shall indemnify the Trustee against any tax, fee or other charge imposed on or assessed against deposited Government Obligations or the principal and interest received on such Government Obligations other than any such tax,
fee or other charge which by law is for the account of the Holders of the defeased Notes; provided that the Trustee shall be entitled to charge any such tax, fee or other charge to such Holder’s account. 

Section 4.06. Reinstatement. If the Trustee or Paying Agent is unable to apply any money or Government Obligations in accordance
with this Article 4 by reason of any legal proceeding or by reason of any order or judgment of any court or governmental authority enjoining, restraining or otherwise prohibiting such application, the Company’s and the Guarantors’
obligations under the Notes and this Indenture relating thereto shall be revived and reinstated as though no deposit had occurred pursuant to this Article 4 until such time as the Trustee or Paying Agent is permitted to apply all such money or
Government Obligations in accordance with this Article 4; provided, however, that (a) if the Company or any of the Guarantors has made any payment of interest on or principal of any Notes following the reinstatement of its obligations, the
Company and the Guarantors shall be subrogated to the rights of the Holders of such Notes to receive such payment from the money or Government Obligations held by the Trustee or Paying Agent and (b) unless otherwise required by any legal
proceeding or any order or judgment of any court or governmental authority, the Trustee or Paying Agent shall return all such money and Government Obligations to the Company or the Guarantors promptly after receiving a written request therefor at
any time, if such reinstatement of the Company’s and the Guarantors’ obligations has occurred and continues to be in effect. 
 6.
EVENTS OF DEFAULT. (a) In addition to items (a) through (g) set forth in Section 5.01 of the Indenture, the following additional provisions shall apply to the Notes
and shall be incorporated into the Indenture with respect to the Notes: 
 (h) failure to pay at maturity, or upon acceleration of, any
Indebtedness of Acuity Parent, the Company and/ or any Significant Subsidiary of Acuity Parent at any one time in an amount in excess of $50.0 million, if the Indebtedness is not discharged or the acceleration is not annulled within 90 days
after written notice to the Company by the Trustee or the Holders holding at least 25% in principal amount of the outstanding Notes; 
 (i)
except as permitted by the Indenture, any Guarantee of the Notes is held in any judicial proceeding to be unenforceable or invalid or ceases for any reason to be in full force and effect, or any Guarantor denies or disaffirms its obligations under
its guarantee of the Notes; or 
 (j) the entry by a court having jurisdiction in the premises of (A) a decree or order for relief in
respect of the Parent Guarantor, the Company or any other Significant Subsidiary in an involuntary case or proceeding under any applicable federal or state bankruptcy, insolvency, reorganization or other similar law or (B) a decree or order
adjudging the Parent Guarantor, the Company or any other Significant Subsidiary a bankrupt or insolvent, or approving as properly filed a petition seeking reorganization, arrangement, adjustment or composition of or in respect

  
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of the Parent Guarantor, the Company or any other Significant Subsidiary under any applicable federal or state law, or appointing a custodian, receiver, liquidator, assignee, trustee,
sequestrator or other similar official of the Parent Guarantor, the Company or any other Significant Subsidiary or of any substantial part of their property, or ordering the winding-up or liquidation of its
affairs, and the continuance of any such decree or order for relief or any such other decree or order unstayed and in effect for a period of 90 consecutive days; or 

(k) the commencement by the Parent Guarantor, the Company or any other Significant Subsidiary of a voluntary case or proceeding under any
applicable federal or state bankruptcy, insolvency, reorganization or other similar law or of any other case or proceeding to be adjudicated a bankrupt or insolvent, or the consent by any of the Parent Guarantor, the Company or any other Significant
Subsidiary to the entry of a decree or order for relief in respect of the Parent Guarantor, the Company or any other Significant Subsidiary in an involuntary case or proceeding under any applicable federal or state bankruptcy, insolvency,
reorganization or other similar law or to the commencement of any bankruptcy or insolvency case or proceeding against the Parent Guarantor, the Company or any other Significant Subsidiary, or the filing by the Parent Guarantor, the Company or any
other Significant Subsidiary of a petition or answer or consent seeking reorganization or relief under any applicable federal or state law, or the consent by the Parent Guarantor, the Company or any other Significant Subsidiary to the filing of such
petition or to the appointment of or taking possession by a custodian, receiver, liquidator, assignee, trustee, sequestrator or other similar official of the Parent Guarantor, the Company or any other Significant Subsidiary or of any substantial
part of its property, or the making by the Parent Guarantor, the Company or any other Significant Subsidiary of an assignment for the benefit of creditors, or the admission by the Parent Guarantor, the Company or any other Significant Subsidiary in
writing of its inability to pay its debts generally as they become due, or the authorization of any such action by the Board of Directors of the Parent Guarantor, the Company or any other Significant Subsidiary. 

(b) In addition to the provisions set forth in Section 5.02 of the Indenture, the following additional provisions shall apply to the Notes
and shall be incorporated into the Indenture with respect to the Notes: 
 If an Event of Default with respect to Notes at the time
Outstanding occurs and is continuing, (other than an Event of Default specified in clauses (j) or (k) of Section 5.01 hereof) then and in every such case the Trustee or the Holders of not less than 25% in principal amount of the
Outstanding Securities of all series affected (voting as a single class) may declare the principal amount (or, if the Securities of that series are Original Issue Discount Securities, such portion of the principal amount of such Securities as may be
specified in the terms thereof) of all of the Securities of all such series to be due and payable immediately, by a notice in writing to the Company (and to the Trustee if given by Holders), and upon any such declaration such principal amount (or
specified amount) shall become immediately due and payable; provided, that if an Event of Default specified in clause (j) or (k) of Section 5.01 hereof occurs with respect to the Company, the unpaid principal of, premium, if any,
and any accrued and unpaid interest on all the Securities shall ipso facto become and be immediately due and payable without further action or notice on the part of the Trustee or any Holder. 

  
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 At any time after such an acceleration with respect to Notes, the Holders of a majority in
principal amount of the outstanding Notes, by written notice to the Company and the Trustee, may rescind and annul such declaration and its consequences if: 

(a) the rescission would not conflict with any judgment or decree; and 

(b) all existing Events of Default have been cured or waived except nonpayment of principal or interest that has become due solely because of
acceleration; 
 (c) to the extent the payment of such interest is lawful, interest on overdue installments of interest and overdue
principal, which has become due otherwise than by such declaration of acceleration, has been paid; and 
 (d) the Company has paid the
Trustee its agreed compensation and reimbursed the Trustee for its expenses, disbursements and advances. 
 No such rescission shall affect any subsequent
Event of Default or impair any right consequent thereon. 
 7. COMPANY MAY CONSOLIDATE,
ETC. ONLY ON CERTAIN TERMS. The following provisions shall be deemed to replace, in their entirety, Sections 8.01 through 8.02 set forth in Article 8 of
the Indenture with respect to the Notes and shall be incorporated into the Indenture with respect to the Notes: 
 Section 8.01
Company May Consolidate, Etc. Only on Certain Terms. (a) The Company shall not merge into or consolidate with any other Person or Persons or sell, lease, transfer, convey or otherwise dispose of its properties and assets substantially as
an entirety to any other Person or Persons, unless: 
  

	 	(i)	 the successor Person is organized under the laws of the United States, any state thereof or the District of
Columbia; 

  

	 	(ii)	 the successor Person expressly assumes, by an indenture supplemental hereto, executed and delivered to the
Trustee, in form satisfactory to the Trustee, the Company’s obligation for the due and punctual payment of the principal of (and premium, if any) and interest on the Notes and the performance and observance of every covenant of the Notes and
the Indenture on the part of the Company to be performed or observed; 

  

	 	(iii)	 immediately after giving effect to such transaction, no Event of Default shall have occurred and be continuing;
and 

  
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	 	(iv)	 the Company has delivered to the Trustee an Officer’s Certificate stating that such consolidation, merger,
sale, conveyance, transfer or lease and, if a supplemental indenture is required in connection with such transaction, such supplemental indenture comply with this Article and that all conditions precedent herein provided for relating to such
transaction have been complied with and an Opinion of Counsel stating that the conditions precedent in Section 8.1(a)(i) relating to such transaction have been complied with. 

(b) The restrictions in Sections 8.01(a) hereof shall not be applicable to 

(i) the merger, amalgamation, arrangement or consolidation of the Company with an affiliate of the Company if the Board of Directors determines
in good faith that the purpose of such transaction is principally to change the state of incorporation of the Company or convert the form of organization of the Company to another form; or 

(ii) the merger of the Company with or into a single direct or indirect wholly owned subsidiary of the Company pursuant to Section 251(g)
(or any successor provision) of the General Corporation Law of the State of Delaware (or similar provision of the Company’s state of incorporation). 

Section 8.02 Successor Person Substituted for the Company. Upon any consolidation of the Company with, or merger of the Company
into, any other Person or any sale, transfer, lease or other conveyance of its properties and assets substantially as an entirety in accordance with Section 8.01(a), the successor Person formed by such consolidation or into which the Company is
merged or to which such sale, transfer, lease or other conveyance is made shall succeed to, and be substituted for, and may exercise every right and power of, the Company under the Indenture with the same effect as if such successor Person had been
named as the Company herein, and thereafter, the predecessor Person shall be released of all obligations to pay principal and interest on the Notes and all other obligations and covenants under the Indenture and the Notes. 

Section 8.03 Parent Guarantor Consolidate, Etc. Only on Certain Terms. (a) The Parent Guarantor shall not merge into or
consolidate with any other Person or Persons or sell, lease, transfer, convey or otherwise dispose of its properties and assets substantially as an entirety to any other Person or Persons, unless: 

(i) the successor Person is organized under the laws of the United States, any state thereof or the District of Columbia; 

(ii) the successor Person expressly assumes, by an indenture supplemental hereto, executed and delivered to the Trustee, in
form satisfactory to the Trustee, the Parent Guarantor’s obligation for the due and punctual payment of the principal of (and premium, if any) and interest on the Notes and the performance and observance of every covenant of the Notes and the
Indenture on the part of the Parent Guarantor to be performed or observed; 
 (iii) immediately after giving effect to such
transaction, no Event of Default shall have occurred and be continuing; and 

  
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 (iv) the Parent Guarantor has delivered to the Trustee an Officer’s
Certificate and an Opinion of Counsel, each stating that such consolidation, merger, sale, conveyance, transfer or lease and, if a supplemental indenture is required in connection with such transaction, such supplemental indenture comply with this
Article and that all conditions precedent herein provided for relating to such transaction have been complied with. 
 (b) The restrictions
in Sections 8.03(a) hereof shall not be applicable to: 
 (i) the merger, amalgamation, arrangement or consolidation of the
Parent Guarantor with an affiliate of the Parent Guarantor if the Board of Directors determines in good faith that the purpose of such transaction is principally to change the state of incorporation of the Parent Guarantor or convert the form of
organization of the Parent Guarantor to another form; or 
 (ii) the merger of the Parent Guarantor with or into a single
direct or indirect wholly owned subsidiary of the Parent Guarantor pursuant to Section 251(g) (or any successor provision) of the General Corporation Law of the State of Delaware (or similar provision of the Parent Guarantor’s state of
incorporation). 
 Section 8.04 Successor Person Substituted for the Parent Guarantor. Upon any consolidation of the Parent
Guarantor with, or merger of the Parent Guarantor into, any other Person or any sale, transfer, lease or other conveyance of its properties and assets substantially as an entirety in accordance with Section 8.03, the successor Person formed by
such consolidation or into which the Parent Guarantor is merged or to which such sale, transfer, lease or other conveyance is made shall succeed to, and be substituted for, and may exercise every right and power of, the Parent Guarantor under the
Indenture with the same effect as if such successor Person had been named as the Parent Guarantor herein, and thereafter, the predecessor Person shall be released of all obligations to pay principal and interest on the Notes and all other
obligations and covenants under the Indenture and the Notes. 
 Any reference in the Indenture to a merger, transfer, consolidation,
amalgamation, consolidation, assignment, sale, disposition or transfer, or similar term, shall be deemed to apply to a division of or by a limited liability company or a limited partnership, or an allocation of assets to a series of a limited
liability company or a limited partnership (or the unwinding of such a division or allocation), as if it were a merger, transfer, consolidation, amalgamation, consolidation, assignment, sale or transfer, or similar term, as applicable, to, of or
with a separate Person. Any division of a limited liability company or a limited partnership shall constitute a separate person hereunder (and each division of any limited liability company or any limited partnership that is a Subsidiary, joint
venture or any other like term shall also constitute such a person or entity). 
 8. MODIFICATIONS: (a) The following provisions
shall be deemed to replace, in their entirety, items (a) through (k) of Sections 9.01 of the Indenture with respect to the Notes and shall be incorporated into the Indenture with respect to the Notes: 

Without the consent of any Holder of Notes, the Company and the Trustee, at any time and from time to time, may enter into one or more
indentures supplemental hereto, in form satisfactory to the Trustee, for any of the following purposes: 
 (a) to cure any ambiguity,
omission, defect or inconsistency; 

  
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 (b) to provide for uncertificated Notes in addition to or in place of certificated Notes;

 (c) to comply with the requirements of the SEC in order to effect or maintain the qualification of the Indenture under the Trust Indenture
Act; 
 (d) to evidence and provide for the acceptance of appointment by a successor Trustee; 

(e) to conform the terms of the Indenture, the Notes and/or the Guarantees to any provision or other description of the Notes or Guarantees, as
the case may be, contained in the Offering Memorandum for the Notes; 
 (f) to provide for the assumption by a successor corporation,
partnership, trust or limited liability company of the Company’s or the Guarantors’ obligations under the Indenture and the Notes, in each case in compliance with the provisions thereof; 

(g) to provide for the issuance of any Additional Notes; 

(h) to comply with the rules of any applicable securities depository; 

(i) to make any change that would provide any additional rights or benefits to the Holders (including to secure the Notes, add guarantees with
respect thereto, transfer any property to or with the Trustee, add to the Company’s covenants for the benefit of the Holders, add any additional events of default for the Notes, or surrender any right or power conferred upon the Company or the
Guarantors) or that does not adversely affect the legal rights hereunder of any Holder in any material respect; 
 (j) change or eliminate
any restrictions on the payment of principal (and premium, if any) on Notes in registered form; provided that any such action shall not adversely affect the interests of the Holders in any material respect; or 

(k) supplement any provision of the Indenture as shall be necessary to permit or facilitate the defeasance and discharge of the Notes in
accordance with the Indenture; provided that such action shall not adversely affect the interests of any of the Holders in any material respect. 
 (b) The
following provisions shall be deemed to replace, in their entirety, items (a) through (c) of Sections 9.02 of the Indenture with respect to the Notes and shall be incorporated into the Indenture with respect to the Notes: 

With the consent of the Holders of not less than a majority in principal amount of the Notes then-outstanding and affected by such
supplemental indenture (voting as a single class), by Act of said Holders delivered to the Company and the Trustee, the Company and the Trustee may enter into an indenture or indentures supplemental hereto for the purpose of adding any provisions to
or changing in any manner or eliminating any of the provisions of this Indenture or of modifying in any manner the rights of the Holders of Notes under this Indenture; provided, however, that no such supplemental indenture shall, without the consent
of the Holder of each Note then-outstanding and affected thereby, 

  
 12 

	 	(a)	 reduce the principal amount of outstanding Notes whose Holders must consent to an amendment;

  

	 	(b)	 reduce the rate of, change or have the effect of changing the time for payment of interest, including defaulted
interest, on the Notes; 

  

	 	(c)	 reduce the principal of, change or have the effect of changing the fixed maturity of the Notes, or change the
date on which the Notes may be subject to redemption or repurchase or reduce the redemption price or repurchase price therefor; 

  

	 	(d)	 make the Notes payable in currency other than that stated in the Notes or change the place of payment of the
Notes from that stated in the Notes or in the Indenture; 

  

	 	(e)	 make any change in provisions of the Indenture protecting the right of each Holder to receive payment of
principal of (and premium, if any) and interest on the Notes on or after the due date thereof or to bring suit to enforce such payment, or permitting Holders holding a majority in principal amount of the Notes to waive Defaults or Events of Default;

  

	 	(f)	 make any change to or modify in any manner adverse to the Holders the terms and conditions of the obligations
of the Guarantors under the Indenture (as modified by the First Supplemental Indenture, or any subsequent Supplemental Indenture); 

  

	 	(g)	 make any change to or modify the ranking of the Notes that would adversely affect the Holders; or

  

	 	(h)	 make any change in these amendment and waiver provisions. 

9. COVENANTS. In addition to Sections 10.01 through 10.07 set forth in Article 10 of the Indenture, the following additional provisions
shall apply to the Notes and shall be incorporated into the Indenture with respect to the Notes: 
 Section 10.08 Limitations on
Liens. (a) The Parent Guarantor shall not, and shall not permit any Restricted Subsidiary to, issue, incur, create, assume or guarantee any Indebtedness secured by a Lien upon a Principal Property or upon any Capital Stock or Indebtedness
of any Restricted Subsidiary without in any such case effectively providing, concurrently with the issuance, incurrence, creation, assumption or guaranty of any such secured Indebtedness, or the grant of such Lien, that the Notes shall be secured
equally and ratably with (or, at the option of the Parent Guarantor, prior to) such secured Indebtedness. The foregoing restriction, however, will not apply to any of the following: 

  
 13 

	 	(1)	 Liens existing on the Issue Date or provided for under the terms of agreements existing on the Issue Date;

  

	 	(2)	 Liens on property or assets of a Person existing at the time it becomes a Subsidiary, securing Indebtedness of
such Person; provided such Indebtedness was not incurred in connection with such Person or entity becoming a Subsidiary and such Liens do not extend to any property or assets other than those of the Person becoming a Subsidiary;

  

	 	(3)	 Liens on property or assets of a Person existing at the time such Person is merged into or consolidated with
the Parent Guarantor or any Restricted Subsidiary, or at the time of a sale, lease, transfer, conveyance or other disposition of all or substantially all of the properties or assets of a Person to the Parent Guarantor or any Restricted Subsidiary;
provided that such Lien was not incurred in anticipation of the merger, amalgamation, arrangement, consolidation, sale, lease, transfer, conveyance, other disposition or other such transaction by which such Person was merged into or consolidated
with the Parent Guarantor or any Restricted Subsidiary; 

  

	 	(4)	 Liens on property or assets securing (i) all or any portion of the cost of acquiring, constructing,
altering, developing, expanding, improving or repairing any property or assets, real or personal, or improvements used or to be used in connection with the property of the Parent Guarantor or any Restricted Subsidiary or (ii) Indebtedness
incurred by the Parent Guarantor or any Restricted Subsidiary to provide funds for the activities set forth in clause (4)(i) above; 

  

	 	(5)	 Liens in favor of the Parent Guarantor or one or more Restricted Subsidiary; 

 

	 	(6)	 Liens on any property or assets securing (i) Indebtedness incurred in connection with the construction,
installation or financing of pollution control or abatement facilities or other form of industrial revenue bond financing or (ii) Indebtedness issued or guaranteed by the United States or any State thereof or any department, agency or
instrumentality of either; 

  

	 	(7)	 Liens for taxes, assessments or government charges or levies not yet due or that are being contested in good
faith by appropriate proceedings; provided that adequate reserves with respect thereto are maintained on the Parent Guarantor’s or any Restricted Subsidiary’s books to the extent required by generally accepted accounting principles;

  

	 	(8)	 Lien arising out of consignment or similar arrangements for the sale by Acuity Parent or any Restricted
Subsidiaries of goods through third parties in the ordinary course of business; 

  

	 	(9)	 Liens in favor of customs and revenue authorities arising as a matter of law to secure payment of customs
duties in connection with the importation of goods; 

  
 14 

	 	(10)	 Liens imposed by law, such as landlord’s, wage earners’, carriers’, warehousemen’s,
mechanics’, materialmen’s, repairmen’s or other like Liens arising in the ordinary course of business of the Parent Guarantor or any Restricted Subsidiary that are not more than 60 days past due or that are being contested in good
faith by appropriate proceedings; 

  

	 	(11)	 Liens to secure the performance of bids, trade contracts, leases, statutory obligations, surety and appeal
bonds, performance bonds and other obligations of a like nature incurred in the ordinary course of business; 

  

	 	(12)	 Liens arising under the Employee Retirement Income Security Act of 1974, as amended from time to time,
including any rules or regulations promulgated thereunder to secure current service pension liabilities as they are incurred under the provisions of the benefit plans of Acuity Parent and its Restricted Subsidiaries; 

 

	 	(13)	 (i) Liens in favor of a trustee with respect to any pension, retirement, deferred compensation 401(k), or other
benefit plan of the Acuity Parent or any Restricted Subsidiary; (ii) Liens arising out of pledges, deposits or statutory trusts in connection with workers’ compensation, unemployment insurance, old age pensions, or other social security or
retirement benefits, or similar legislation or (iii) Liens incurred in the ordinary course of business securing liability for reimbursement or indemnification obligations of insurance carriers providing property, casualty or liability insurance
to Acuity Parent or any Restricted Subsidiary in respect of such obligations; 

  

	 	(14)	 utility easements, building restrictions, zoning restrictions, rights-of-way and such other encumbrances or charges against real property as are of a nature generally existing with respect to properties of a similar character and that do not in any material way affect
the marketability of the same or interfere with the use thereof in the ordinary course of business of the Parent Guarantor or any Restricted Subsidiary; 

  

	 	(15)	 Liens arising under operating agreements or similar agreements entered into in the ordinary course of business
in respect of obligations that are not yet due or that are being contested in good faith by appropriate proceedings; 

  

	 	(16)	 Liens on personal property (excluding the Capital Stock of any Restricted Subsidiary) securing Indebtedness of
the Parent Guarantor or any Restricted Subsidiary, other than Indebtedness that matures more than 12 months after its creation, incurred in the ordinary course of business; 

 

	 	(17)	 Liens that secure a judgment or other court-ordered award or settlement as to which the Parent Guarantor or any
Restricted Subsidiary has not exhausted its appellate rights; 

  

	 	(18)	 Liens to secure Hedging Obligations; 

  
 15 

	 	(19)	 Liens to secure any extension, renewal, refinancing or refunding (or successive extensions, renewals,
refinancings or refundings), in whole or in part, of any Indebtedness secured by Liens referred to in any of clauses (1) to (18) above, so long as such Lien is limited to all or part of substantially the same property that secured the Lien
extended, renewed or replaced, and the amount of Indebtedness secured is not increased (other than by the amount equal to any costs and expenses (including any premium, fees or penalties) incurred in connection with any extension, renewal,
refinancing or refunding); and 

  

	 	(20)	 Liens in favor of the Trustee for amounts payable to the Trustee under the Indenture. 

(b) Notwithstanding the restrictions in the preceding paragraph, the Parent Guarantor and the Restricted Subsidiaries shall be permitted to
incur Indebtedness, secured by Liens otherwise prohibited by Section 10.08, which, together with the value of Attributable Debt outstanding pursuant to any Sale and Lease-Back Transaction permitted pursuant to the Section 10.9(b), do not
exceed 15% of Consolidated Net Tangible Assets measured at the date of incurrence of the Lien. 
 Section 10.09 Limitations on Sale
and Lease-Back Transactions. (a) The Parent Guarantor shall not, and shall not permit any Restricted Subsidiary to, enter into any Sale and Lease-Back Transaction with respect to any Principal Property, other than any such Sale and
Lease-Back Transaction involving a lease for a term of not more than three years or any such Sale and Lease-Back Transaction between the Parent Guarantor and one of the Restricted Subsidiaries or between the Restricted Subsidiaries, unless: 

 

	 	(1)	 the Parent Guarantor or such Restricted Subsidiary would be entitled to incur Indebtedness secured by a Lien on
the Principal Property involved in such Sale and Lease-Back Transaction at least equal in amount to the Attributable Debt with respect to such Sale and Lease-Back Transaction, without equally and ratably securing the Notes, pursuant to
Section 10.08 hereof; or 

  

	 	(2)	 the proceeds of such Sale and Lease-Back Transaction are at least equal to the fair market value of the
affected Principal Property (as determined in good faith by the Parent Guarantor’s Board of Directors) and the Parent Guarantor or such Restricted Subsidiary applies an amount equal to the net proceeds of such Sale and Lease-Back Transaction
within 12 months of such Sale and Lease-Back Transaction to any (or a combination) of; 

  

	 	a.	 the prepayment or retirement of the Notes; 

 

	 	b.	 the prepayment, retirement or defeasance (other than any mandatory retirement, mandatory prepayment or sinking
fund payment or by payment at maturity) of other Indebtedness of the Parent Guarantor or of one of the Restricted Subsidiaries (other than Indebtedness that is subordinated to the 

  
 16 

	 	
Notes or Indebtedness owed to the Parent Guarantor or one of the Restricted Subsidiaries) that matures more than 12 months after its creation; or 

 

	 	c.	 the acquisition, construction, alteration, development, expansion, improvement or repair of other property used
or to be used in the ordinary course of business of the Parent Guarantor or a Restricted Subsidiary; provided, that for purposes of this clause (2)(c), any amounts expended to acquire, construct, alter, develop, expand, improve or repair such other
property during the six months preceding such Sale and Lease-Back Transaction may also be applied as a credit against the net proceeds from the Sale and Lease-Back Transaction 

(b) Notwithstanding the restrictions in the preceding paragraph, the Parent Guarantor and the Restricted Subsidiaries shall be permitted to
enter into Sale and Lease-Back Transactions otherwise prohibited by this Section 10.09, which, together with all Indebtedness outstanding pursuant to Section 10.08(b), do not exceed 15% of Consolidated Net Tangible Assets measured at the
closing date of the Sale and Lease-Back Transaction. 
 10. CROSS REFERENCES. References
to Section 4.03 in the definition of “Outstanding” in the Indenture and in Section 3.01(r), shall instead refer to “Section 4.01”. References to Section 4.02 in the definition of “Outstanding”
in the Indenture shall instead refer to “Section 4.02”. 
 11. DEFINITIONS. In addition
to the definitions set forth in Article I of the Indenture, each of the Notes shall include the following additional definitions, which, in the event of a conflict with the definition of terms in the Indenture, shall control: 

“Attributable Debt” means, with respect to a Sale and Lease-Back Transaction with respect to any Principal Property, at the
time of determination, the present value of the total net amount of rent (for the avoidance of doubt, “net amount of rent” excludes amounts required to be paid on account of maintenance and repairs, reconstruction insurance, taxes,
assessments, water rates and similar charges and contingent rates, such as those based on net sales) required to be paid under such lease during the remaining term thereof (including any period for which such lease has been extended), discounted at
the rate of interest set forth or implicit in the terms of such lease (or, if not practicable to determine such rate, the weighted average interest rate per annum borne by the Notes then outstanding under the Indenture) compounded semi-annually. In
the case of any lease that is terminable by the lessee upon the payment of a penalty, such net amount shall be the lesser of (x) the net amount determined assuming termination upon the first date such lease may be terminated (in which case the
net amount shall also include the amount of the penalty, but shall not include any rent that would be required to be paid under such lease subsequent to the first date upon which it may be so terminated) or (y) the net amount determined
assuming no such termination. 
 “Capital Stock” means: 

 

	 	(1)	 with respect to any person that is a corporation, any and all shares, interests, participations or other
equivalents (however designated and whether or not voting) of corporate stock, including each class of common stock and preferred stock of such person, and all options, warrants or other rights to purchase or acquire any of the foregoing; and

  
 17 

	 	(2)	 with respect to any person that is not a corporation, any and all partnership, membership or other equity
interests of such person, and all options, warrants or other rights to purchase or acquire any of the foregoing. 

“Consolidated Net Tangible Assets” means, as of any date on which Acuity Parent or a Restricted Subsidiary effects a
transaction requiring such Consolidated Net Tangible Assets to be measured hereunder, the aggregate amount of assets (less applicable reserves) after deducting therefrom: (1) all current liabilities, except for current maturities of long-term
debt and obligations under capital leases; and (2) intangible assets (including goodwill), to the extent included in said aggregate amount of assets, all as set forth on the most recent consolidated balance sheet of Acuity Parent and its
subsidiaries and computed in accordance with generally accepted accounting principles in the United States of America applied on a consistent basis. 

“Default” means an event or condition the occurrence of which is, or with the lapse of time or the giving of notice or both
would be, an Event of Default. 
 “Hedging Obligations” means: 

 

	 	(1)	 interest rate swap agreements (whether from fixed to floating or from floating to fixed), interest rate cap
agreements and interest rate collar agreements; 

  

	 	(2)	 other agreements or arrangements designed to manage interest rates or interest rate risk;

  

	 	(3)	 other agreements or arrangements designed to protect against fluctuations in currency exchange rates or
commodity prices; and 

  

	 	(4)	 other agreements or arrangements designed to protect against fluctuations in equity prices.

 “Indebtedness” means with respect to any person, without duplication: 

 

	 	(1)	 all obligations of such person for borrowed money; and 

 

	 	(2)	 all obligations of such person evidenced by bonds, debentures, notes or other similar instruments.

 “Issue Date” means the date of original issuance of the Notes but not any additional Securities. 

“Lien” means any lien, mortgage, deed of trust, hypothecation, pledge, security interest, charge or encumbrance of any kind.

 “Principal Property” means any manufacturing plant or facility located within the United States of America (other than
its territories or possessions) owned by Acuity Parent or any Restricted Subsidiary which in the good faith opinion of Acuity Parent’s board of directors, is of material importance to the total business conducted by Acuity Parent and the
Restricted Subsidiaries as a whole. 

  
 18 

 “Restricted Subsidiary” means any Subsidiary of Acuity Parent
(1) substantially all the property of which is located, or substantially all the business of which is carried on, within the United States of America (not including its territories and possessions) and (2) that owns a Principal Property;
provided that the term “Restricted Subsidiary” will not include any Subsidiary that is principally engaged in financing the operations of Acuity Parent, or its Subsidiaries, or both, outside of the United States of America. 

“Sale and Lease-Back Transaction” means any arrangement with any person providing for the leasing by the Company or any
Guarantor of any Principal Property, whether now owned or hereafter acquired, which Principal Property has been or is to be sold or transferred by the Company or any Guarantor to such person. 

“Significant Subsidiaries” means any Subsidiary that is a “significant subsidiary” within the meaning of Rule 1-02(w) of Regulation S-X under the Securities Act. 

“Subsidiary” means any corporation, limited liability company, limited partnership or other similar type of business entity
in which Acuity Parent and/or one or more of its Subsidiaries together own more than 50% of the total voting power of shares of capital stock entitled (without regard to the occurrence of any contingency) to vote in the election of the board of
directors or similar governing body of such corporation, limited liability company, limited partnership or other similar type of business entity, directly or indirectly. 

12. CONSIDERATION. Each of the Guarantors has received, or shall receive, direct or indirect benefits from
the making of the Guarantees. 
 13. NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO
CONSTRUE THIS FIRST SUPPLEMENTAL INDENTURE. 
 14. COUNTERPARTS. The parties may sign any number of
copies of this First Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. The exchange of copies of this First Supplemental Indenture and of signature pages by facsimile or PDF
transmission shall constitute effective execution and delivery of this First Supplemental Indenture as to the parties hereto and may be used in lieu of the original First Supplemental Indenture for all purposes. Signatures of the parties hereto
transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes. 
 15. EFFECT
OF HEADINGS. The Section headings herein are for convenience only and shall not affect the construction hereof. 

16. THE TRUSTEE. The Trustee shall not be responsible in any manner whatsoever for or in
respect of the validity or sufficiency of this First Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiaries and the Company. 

  
 19 

 17. MISCELLANEOUS. All notices, approvals, consents,
requests and other communications hereunder must be in writing (and any communication sent to the Trustee hereunder must be in the form of a document that is signed manually or by way of a digital signature provided via DocuSign (or such other
digital signature provider as specified in writing to the Trustee by the Company) or an electronic copy thereof), in English, and may only be delivered (a) by personal delivery, or (b) by national overnight courier service, or (c) by
certified or registered mail, return receipt requested, or (d) by facsimile transmission, with confirmed receipt or (e) by email by way of a PDF attachment thereto. Notice will be effective upon receipt except for notice via email, which
will be effective only when the recipient, by return email or notice delivered by other method provided for in this Section, acknowledges having received that email (with an automatically generated receipt or similar notice not constituting an
acknowledgement of an email receipt for purposes of this Section). The Company agrees to assume all risks arising out of the use of DocuSign digital signatures and electronic methods to submit instructions and directions to the Trustee, including
without limitation the risk of the Trustee acting on unauthorized instructions, and the risk of interception and misuse by third parties. 

  
 20 

 IN WITNESS WHEREOF, the parties hereto have caused this First Supplemental Indenture to be
duly executed and attested, all as of the date first above written. 
 Dated: November 10, 2020 

 

					
	ACUITY BRANDS, INC.
		
	By:	 	 /s/ Karen J. Holcom

		 	Name:	 	Karen J. Holcom
		 	Title:	 	Senior Vice President and Chief
		 		 	Financial Officer
	
	ABL IP HOLDING LLC
		
	By:	 	 /s/ Karen J. Holcom

		 	Name:	 	Karen J. Holcom
		 	Title:	 	Senior Vice President and Chief
		 		 	Financial Officer
	
	ACUITY BRANDS LIGHTING, INC.
		
	By:	 	 /s/ Karen J. Holcom

		 	Name:	 	Karen J. Holcom
		 	Title:	 	Senior Vice President and Chief
		 		 	Financial Officer
	
	U.S. BANK NATIONAL ASSOCIATION, as Trustee
		
	By:	 	 /s/ David Ferrell

		 	Name:	 	David Ferrell
		 	Title:	 	Vice PresidentEX-4.3

 Exhibit 4.3 

OFFICER’S CERTIFICATE PURSUANT TO 

SECTIONS 3.01 AND 3.03 OF THE INDENTURE IDENTIFIED BELOW 

The undersigned officer of Acuity Brands Lighting, Inc. (the “Company”), acting pursuant to authorization contained in
resolutions of the Board of Directors of the Company duly adopted on October 27, 2020 and in resolutions of the Pricing Committee of the Board of Directors of Acuity Brands, Inc. (the “Parent Guarantor”) duly adopted on
October 27, 2020, does hereby authorize, adopt and approve the following terms for a series of the Company’s debt securities designated as “2.150% Senior Notes due 2030” (the “Notes”), such series to be issued
under an indenture, dated as of November 10, 2020 (the “Base Indenture”), between the Company and U.S. Bank National Association, as trustee (the “Trustee”), as supplemented by a first supplemental indenture,
dated as of November 10, 2020 the “First Supplemental Indenture” and, together with the Base Indenture, the “Indenture”), among the Company, the Parent Guarantor and ABL IP Holding LLC (the “Subsidiary
Guarantor” and, together with the Parent Guarantor, the “Guarantors”) and the Trustee, which Notes have been registered for sale with the Securities and Exchange Commission pursuant to a Registration Statement on Form S-3 (No. 333-249656) under the Securities Act of 1933, as amended. Capitalized terms used but not defined herein shall have the meanings set forth in the Indenture. 

1. The Notes are limited in aggregate principal amount to U.S. $500,000,000.00, subject to (i) the Company’s right from time to
time, without giving notice to or seeking the consent of the holders of a series of the Notes, to issue an unlimited amount of additional securities having the same terms as such series of the Notes other than the issue date, issue price and the
payment of interest accruing prior to the issue date of the additional securities, or the first payment of interest following the issue date of such additional securities, provided that if such additional securities are not fungible with the
then-outstanding Notes for U.S. federal income tax purposes, the additional securities shall have a separate CUSIP number, and (ii) Notes of any series authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu
of, other Notes of such series pursuant to the provisions of the Indenture. 
 2. The Notes will mature on December 15, 2030, subject
to the provisions of the Indenture and this Officer’s Certificate relating to optional redemption. 
 Interest on the Notes will be
computed on the basis of a 360-day year comprised of twelve 30-day months. The Notes will bear interest from November 10, 2020, or from the most recent Interest
Payment Date (as defined below) to which interest has been paid or provided for to, but excluding, the next Interest Payment Date or Maturity, as the case may be (each of these periods, a “Interest Period”), at the rate of 2.150%
per annum, payable semi-annually in arrears on June 15 and December 15 of each year (each a “Interest Payment Date”), commencing on June 15, 2021 to the persons in whose names the Notes are registered at the close of
business on the immediately preceding June 1 and December 1, respectively, whether or not such date is a Business Day (each a “Regular Record Date”). 

3. Principal and interest on the Notes shall be payable, and the Notes may be surrendered for registration of transfer or exchange, at the
office or agency of the Company maintained for that purpose, pursuant to the Indenture, which shall initially be the Corporate Trust Office of the Trustee located at U.S. Bank National Association, Global Corporate Trust Services, 1349 W. Peachtree
St. NW, Ste. 1050, Atlanta, GA 30309, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debt. 

  
 1 

 The Company, by or through the Trustee, may at its option pay interest by United States
dollar check mailed to the address of the Person entitled thereto as such address shall appear in the Security Register; provided, however, that payments in connection with Global Securities to The Depository Trust Company
(“DTC”) will be made by wire transfer of immediately available funds to the account of DTC or its nominee. 
 4. At any
time prior to September 15, 2030 (the “Par Call Date”), the Company may redeem the Notes, in whole or from time to time in part, at a redemption price equal to the greater of the following amounts, plus, in each case, accrued
and unpaid interest thereon to the Redemption Date: 
  

	 	•	 	 100% of the principal amount of the Notes to be redeemed; and 

 

	 	•	 	 the sum of the present values of the Remaining Scheduled Payments discounted to the Redemption Date, on a
semiannual basis (assuming a 360-day year consisting of twelve 30-day months) at a rate equal to the sum of the Treasury Rate plus 0.25%. 

In addition, on or after the Par Call Date, the Company may redeem the Notes, in whole or from time to time in part, at a redemption price
equal to 100% of the aggregate principal amount of the notes to be redeemed plus accrued and unpaid interest, if any, to, but excluding, the Redemption Date. For the avoidance of doubt, the Trustee, acting in any capacity, shall have no obligation
to make any calculation in connection with the Par Call Date, and no responsibility or liability for any such calculation made by any other party. 

Notwithstanding the foregoing, installments of interest on the Notes that are due and payable on Interest Payment Dates falling on or prior to
a Redemption Date will be payable on the relevant Interest Payment Date to the Holders of such Notes as of the close of business on the Regular Record Date immediately preceding such Interest Payment Date. The redemption price will be calculated on
the basis of a 360-day year consisting of twelve 30-day months. 

No notes of a principal amount of $2,000 or less shall be redeemed in part. Notice of redemption will be mailed or electronically delivered at
least 10 but not more than 60 days before such redemption date to each Holder of notes to be redeemed. Once notice of redemption is sent, the Notes called for redemption will become due and payable on the Redemption Date and at the applicable
redemption price, plus accrued and unpaid interest to the Redemption Date, subject to any conditions precedent specified in such notice. Notice of any redemption of notes may, at the Company’s discretion, be given subject to one or more
conditions precedent, including, but not limited to, completion of a corporate transaction that is pending (such as an equity or equity-linked offering, an incurrence of indebtedness or an acquisition or other strategic transaction involving a
change of control in the Company or another entity). If such redemption is so subject to satisfaction of one or more conditions precedent, such notice shall describe each such condition, and such notice may be rescinded in the event that any or all
such conditions shall not have been satisfied or otherwise waived on or prior to the business day immediately preceding the relevant redemption date. 

  
 2 

 The Company shall notify holders of any such rescission as soon as practicable following its
determination that such conditions precedent will not be able to be satisfied or that the Company is not able or willing to waive such conditions precedent. 

On and after any Redemption Date, interest will cease to accrue on the Notes or any portion of the Notes called for redemption (unless the
Company defaults in the payment of the redemption price and accrued interest). On or before the Redemption Date, the Company will deposit with a paying agent or the Trustee money sufficient to pay the redemption price of and accrued interest on the
Notes to be redeemed on that date. If less than all of the Notes of a series are to be redeemed, the Notes of that series to be redeemed shall be selected by the Trustee pro rata, by lot, or by such other method the Trustee deems to be fair and
appropriate, in each case in accordance with the applicable procedures of DTC. 
 For purposes of this Clause 4: 

“Comparable Treasury Issue” means the United States Treasury security or securities selected by an Independent Investment
Banker as having an actual or interpolated maturity comparable to the remaining term of the notes to be redeemed (assuming that such notes matured on the Par Call Date) that would be utilized, at the time of selection and in accordance with
customary financial practice, in pricing new issues of corporate debt securities of a comparable maturity to the remaining term of such notes (assuming that such notes matured on the Par Call Date). 

“Comparable Treasury Price” means, with respect to any Redemption Date, (1) the average of the Reference Treasury Dealer
Quotations for such Redemption Date after excluding the highest and lowest of such Reference Treasury Dealer Quotations, (2) if the Company obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such quotations or
(3) if only one Reference Treasury Dealer Quotation is received, such quotation. 
 “Independent Investment Banker”
means one of the Reference Treasury Dealers, appointed by us. 
 “Redemption Date” means, with respect to the Notes of each
series, any date fixed for redemption by or pursuant to the Indenture and such Notes. 
 “Reference Treasury Dealer” means
BofA Securities, Inc. and J.P. Morgan Securities LLC and their respective affiliates, and their respective successors and up to two other nationally recognized investment banking firms that are primary U.S. government securities dealers in the City
of New York (a “Primary Treasury Dealer”) as selected by the Parent Guarantor. If any of the foregoing or their affiliates shall cease to be a Primary Treasury Dealer, the Company will substitute therefor another Primary Treasury
Dealer. 
 “Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any Redemption
Date, the average, as determined by the Company, of the bid and ask prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Company by such Reference Treasury Dealer at 3:30
p.m. (New York City time) on the third Business Day preceding such Redemption Date. 

  
 3 

 “Remaining Scheduled Payments” means, with respect to each note to be
redeemed, the remaining scheduled payments of principal of and interest on the note that would be due after the related Redemption Date (calculated as if such notes matured on the Par Call Date) but for the redemption. If that Redemption Date is not
an interest payment date with respect to a note, the amount of the next succeeding scheduled interest payment on the note will be reduced by the amount of interest accrued on the note to the Redemption Date. 

“Treasury Rate” means, with respect to any Redemption Date, the rate per annum equal to the semi-annual equivalent yield to
maturity or interpolation (on a day count basis) of the interpolated Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such
Redemption Date. 
 5. The Notes shall not be entitled to the benefit of any mandatory redemption or sinking fund. The Company may, at any
time and from time to time, repurchase the Notes in the open market. 
 6. The Notes shall be issued only in denominations of U.S. $2,000,
and any integral multiple of U.S. $1,000 in excess thereof. 
 7. The Trustee, Paying Agent and Security Registrar for the Notes shall
initially be U.S. Bank National Association. 
 8. Upon issuance, the Notes of each series will be represented by one or more global
Securities representing all of the aggregate principal amount of such Notes and will be registered in the name of the nominee of DTC, which will act as depository. DTC, or any successor depository for the Notes permitted by the terms of the
Indenture, this Officer’s Certificate and the Notes, is hereinafter referred to as the “Depository.” Except as set forth in the Indenture, owners of beneficial interests in the Notes will not be entitled to have Notes
registered in their names, will not receive or be entitled to receive Notes in definitive form and will not be considered Holders of Notes under the Indenture. 

Notwithstanding any other provisions of the Indenture, this Officer’s Certificate or the Notes, unless and until exchanged in whole or in
part for the individual Securities represented thereby, the global Security or Securities representing all or a portion of the Notes of the applicable series may not be transferred except, as provided in Section 3.05 of the Indenture, by the
Depositary to another nominee of the Depository for the Notes, or by a nominee of such Depositary to such Depositary or another nominee of such Depositary, or by such Depositary or any such nominee to a successor Depository or nominee of such
successor Depositary. 
 9. The Notes shall be defeasible pursuant to Article 4 of the Indenture. 

10. The issue price to public of the Notes shall be 99.737% of the principal amount of the Notes. 

  
 4 

 11. We hereby approve the form of and authorize the execution and delivery of the Notes
substantially in the forms attached hereto as Exhibit A. 
 12. In addition to Sections 10.01 through 10.09 set forth in Article 10 of
the Indenture, the following additional provisions shall apply to the Notes and shall be incorporated into the Indenture with respect to the Notes: 

Section 10.10 Change of Control Offer. If a Change of Control Triggering Event occurs, unless the Company has exercised its right
to redeem the Notes as described in Article 11, the Company shall be required to make an offer (the “Change of Control Offer”) to each Holder of Notes to repurchase all or, at the Holder’s option, any part (equal to $2,000 or
an integral multiple of $1,000 in excess thereof) of that Holder’s Notes on the terms set forth in the Notes. In the Change of Control Offer, the Company shall be required to offer payment in cash equal to 101% of the aggregate principal amount
of Notes repurchased, plus accrued and unpaid interest, if any, on the Notes repurchased to, but not including, the date of repurchase (the “Change of Control Payment”). Within 30 days following any Change of Control Triggering
Event, a notice shall be mailed or electronically delivered to Holders of the Notes describing the transaction or transactions that constitutes or may constitute the Change of Control Triggering Event and offering to repurchase the Notes on the date
specified in the notice, which date shall be no earlier than 30 days and no later than 60 days from the date such notice is mailed or electronically delivered (the “Change of Control Payment Date”). The notice shall, if mailed or
electronically delivered prior to the date of consummation of the Change of Control, state that the offer to purchase is conditioned on the Change of Control Triggering Event occurring on or prior to the Change of Control Payment Date. 

In order to accept the Change of Control Offer, the Holder must deliver to the Paying Agent, at least five Business Days prior to the Change
of Control Payment Date, this Note together with the form entitled “Election Form” (which form is annexed to the form of Note) duly completed, or a facsimile transmission or a letter from a member of a national securities exchange, or the
Financial Industry Regulatory Authority or a commercial bank or trust company in the United States setting forth: 
  

	 	(1)	 the name of the Holder of this Note; 

 

	 	(2)	 the principal amount of this Note; 

 

	 	(3)	 the principal amount of this Note to be repurchased; 

 

	 	(4)	 the certificate number or a description of the tenor and terms of this Note; 

 

	 	(5)	 a statement that the Holder is accepting the Change of Control Offer; and 

 

	 	(6)	 a guarantee that this Note, together with the form entitled “Election Form” duly completed, shall be
received by the Paying Agent at least five Business Days prior to the Change of Control Payment Date. 

  
 5 

 Any exercise by a Holder of its election to accept the Change of Control Offer shall be
irrevocable. The Change of Control Offer may be accepted for less than the entire principal amount of this Note, but in that event the principal amount of this Note remaining outstanding after repurchase must be equal to $2,000 or an integral
multiple of $1,000 in excess thereof. 
 On the Change of Control Payment Date, the Company shall, to the extent lawful: 

 

	 	(1)	 accept for payment all Notes or portions of Notes properly tendered pursuant to the Change of Control Offer;

  

	 	(2)	 deposit with the Paying Agent an amount equal to the Change of Control Payment in respect of all Notes or
portions of Notes properly tendered; and 

  

	 	(3)	 deliver or cause to be delivered to the Trustee the Notes properly accepted together with an Officer’s
Certificate stating the aggregate principal amount of Notes or portions of Notes being repurchased. 

 The Company shall
not be required to make a Change of Control Offer upon the occurrence of a Change of Control Triggering Event if (i) a third party makes such an offer in the manner, at the times and otherwise in compliance with the requirements for an offer
made by the Company and the Guarantor and the third party repurchases all Notes properly tendered and not withdrawn under its offer or (ii) a notice of redemption relating to the redemption of all of the notes has been given pursuant to the
Indenture as described in Clause 4 above and, in the event that such redemption is subject to one or more conditions precedent, such conditions have been satisfied or waived. In the event that such third party terminates or defaults its offer, the
Company will be required to make a Change of Control Offer treating the date of such termination or default as though it were the date of the Change of Control Triggering Event. Notwithstanding anything to the contrary herein, a Change of Control
Offer may be made in advance of a Change of Control Triggering Event, conditional upon such Change of Control Triggering Event, if a definitive agreement is in place for the Change of Control at the time of making the Change of Control Offer. 

At the time the Company delivers Notes to the Trustee which are to be accepted for repurchase, the Company shall also deliver an
Officer’s Certificate stating that such Notes are to be accepted by the Company pursuant to and in accordance with the terms hereof. A Note shall be deemed to have been accepted for repurchase at the time the Trustee, directly or through an
agent, mails or delivers payment therefor to the surrendering Holder. 
 Prior to any Change of Control Offer, the Company shall deliver to
the Trustee an Officer’s Certificate stating that all conditions precedent contained herein to the right of the Company to make such offer have been complied with. 

The Company and the Guarantors shall comply with the requirements of Rule 14e-1 under the Exchange Act
and any other securities laws and regulations thereunder, to the extent those laws and regulations are applicable in connection with the repurchase of the Notes as a result of a Change of Control Triggering Event. To the extent that the provisions
of any such 

  
 6 

 
securities laws or regulations conflict with the Change of Control Offer provisions of the Notes, the Company and the Guarantors shall comply with those securities laws and regulations and shall
not be deemed to have breached their obligations under the Change of Control Offer provisions of the Notes by virtue of any such conflict. 

“Change of Control” means the occurrence of any one of the following: (1) the direct or indirect sale, lease, transfer,
conveyance or other disposition (other than by way of merger, amalgamation, arrangement or consolidation), in one or a series of related transactions, of all or substantially all of the properties or assets of the Parent Guarantor and its
subsidiaries, taken as a whole, to one or more Persons, other than to the Parent Guarantor or one of its subsidiaries; (2) the Company becomes aware of the consummation of any transaction including, without limitation, any merger,
amalgamation, arrangement or consolidation the result of which is that any Person becomes the beneficial owner, directly or indirectly, of more than 50% of the Parent Guarantor’s Voting Stock (as defined below); (3) the Parent Guarantor
consolidates with, or merges with or into, any Person, or any Person consolidates with, or merges with or into, the Parent Guarantor, in any such event pursuant to a transaction in which any of the outstanding Voting Stock of the Parent Guarantor or
of such other Person is converted into or exchanged for cash, securities or other property, other than any such transaction where the shares of the Parent Guarantor’s Voting Stock outstanding immediately prior to such transaction constitute, or
are converted into or exchanged for, a majority of the Voting Stock of the surviving Person immediately after giving effect to such transaction; or (4) the adoption of a plan relating to the liquidation or dissolution of the Parent Guarantor.
For the purposes of this definition, “Person” and “beneficial owner” have the meanings used in Section 13(d) of the Exchange Act. 

“Change of Control Triggering Event” means the Notes cease to be rated Investment Grade by both Rating Agencies on any date
during the period (the “Trigger Period”) commencing on the first public announcement of the Change of Control and ending 60 days following consummation of such Change of Control, which Trigger Period shall be extended following
consummation of a Change of Control for so long as any of the Rating Agencies has publicly announced that it is considering a possible ratings change; provided that if a Rating Agency making such a reduction in rating publicly announces or
confirms or informs the Trustee in writing at the Company’s request that the reduction was not the result, in whole or in part, of any event or circumstance comprised of, or in respect of, the Change of Control (whether or not the applicable
Change of Control has occurred at such time) no Change of Control Triggering Event shall be deemed to have occurred. Unless at least one Rating Agency is providing a rating for the Notes at the commencement of any Trigger Period, the Notes shall be
deemed to have ceased to be rated Investment Grade during that Trigger Period. Notwithstanding the foregoing, no Change of Control Triggering Event shall be deemed to have occurred in connection with any particular Change of Control unless and until
such Change of Control has actually been consummated. 
 “Investment Grade” means a rating equal to or higher than Baa3 (or
the equivalent) by Moody’s or BBB- (or the equivalent) by S&P and the equivalent investment grade credit rating from any replacement Rating Agency or Rating Agencies selected by the Parent Guarantor.

 “Moody’s” means Moody’s Investors Service, Inc., a subsidiary of Moody’s Corporation, and its successors.

  
 7 

 “Rating Agencies” means (1) each of Moody’s and S&P; and
(2) if any of the Rating Agencies ceases to provide rating services to issuers or investors, and no Change of Control Triggering Event has occurred or is occurring, a “nationally recognized statistical rating organization” within the
meaning of Rule 15c3-1(c)(2)(vi)(F) under the Exchange Act that is selected by the Parent Guarantor (as certified by a resolution of its Board of Directors) as a replacement for Moody’s or S&P, or
both of them, as the case may be. 
 “S&P” means Standard & Poor’s Rating Services, a division of The
McGraw-Hill Companies, Inc., and its successors. 
 “Voting Stock” of any specified Person as of any date means the Capital
Stock of such Person that is at the time entitled to vote generally in the election of the Board of Directors of such Person. 
  

  
 8 

 IN WITNESS WHEREOF the undersigned has executed this Officer’s Certificate on behalf of
the Company as of this 10th day of November, 2020. 
  

			
	ACUITY BRANDS LIGHTING, INC.
		
	By:	 	/s/ Karen J. Holcom
		 	Name: Karen J. Holcom
		 	Title: Senior Vice President and
		 	          Chief Financial Officer

 EXHIBIT A 

[Form of 2.150% Senior Note due 2030] 

[Face of Note] 
 UNLESS
THIS NOTE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY NOTE ISSUED IS REGISTERED
IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY
TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. 

THIS NOTE IS A GLOBAL NOTE WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF DTC OR A NOMINEE
THEREOF. THIS NOTE MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A NOTE REGISTERED, AND NO TRANSFER OF THIS NOTE IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN DTC OR SUCH NOMINEE, EXCEPT IN THE LIMITED CIRCUMSTANCES
DESCRIBED IN THE INDENTURE. 
 ACUITY BRANDS LIGHTING, INC. 
  

			
	 No. [ ]
	  	U.S. $500,000,00.00
		  	CUSIP / ISIN: 00510R AD5 / US00510RAD52

 ACUITY BRANDS LIGHTING, INC., a corporation duly organized and existing under the laws of the State of
Delaware (herein called the “Company”, which term includes any successor Person under the Indenture referred to on the reverse hereof), for value received, hereby promises to pay to Cede & Co., or registered assigns, the
principal sum of FIVE HUNDRED MILLION UNITED STATES DOLLARS on December 15, 2030 and to pay interest thereon from November 10, 2020 or from the most recent Interest Payment Date to which interest has been paid or duly provided for,
semi-annually in arrears on June 15 and December 15 in each year, commencing on June 15, 2021 at the rate of 2.150% per annum, computed on the basis of a 360-day year comprised of twelve 30-day months, until the principal hereof is paid or made available for payment. The interest so payable, and timely paid or duly provided for, on any Interest Payment Date will, as provided in such Indenture, be
paid to the Person in whose name this Note (or one or more Predecessor Notes) is registered at the close of business on the Regular Record Date for such interest, which shall be the June 1 or December 1 (whether or not a Business Date), as
the case may be, next preceding such Interest Payment Date. Except as otherwise provided in the Indenture, any such interest not so timely paid or duly provided for will forthwith cease to be payable to the Holder on such Regular Record Date and may
either be paid to the Person in whose name this Note (or one or more Predecessor Notes) is 

 
registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Company, notice whereof shall be given to Holders of Notes of this
series not less than 10 days prior to such Special Record Date, or be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Notes of this series may be listed, and upon such notice
as may be required by such exchange, all as more fully provided in said Indenture. 
 Payment of the principal of (and premium, if any) and
any such interest on this Note will be made at the office or agency of the Company maintained for that purpose, pursuant to the Indenture, which shall initially be the Corporate Trust Office of the Trustee located at U.S. Bank National Association,
Global Corporate Trust Services, 1349 W. Peachtree St. NW, Ste. 1050, Atlanta, GA 30309, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debt; provided,
however, (a) in the case of Notes in global form registered in the name of or held by The Depository Trust Company (“DTC”) or its nominee, payment of the principal of (and premium, if any) and interest will be made in immediately
available funds to DTC or its nominee, as the case may be, as the registered holder of such Global Note, and (b) in the case of other Notes, at the option of the Company payment of the principal of (and premium, if any) and interest may be made
by check mailed to the address of the Person entitled thereto as such address shall appear in the Security Register. 
 Reference is hereby
made to the further provisions of this Note set forth on the reverse side hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. 

Unless the certificate of authentication hereon has been executed by the Trustee referred to on the reverse hereof, directly or through an
Authenticating Agent, by manual signature of an authorized signatory, this Note shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose. 

 IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed. 

Dated: November 10, 2020 
  

			
	ACUITY BRANDS LIGHTING, INC.
		
	By:	 	                
		 	Name: Karen J. Holcom
		 	Title: Senior Vice President and Chief Financial Officer

 CERTIFICATE OF AUTHENTICATION 

This is one of the Notes of the series designated herein issued under the Indenture described herein. 

Dated: November 10, 2020 
  

			
	U.S. Bank National Association, as Trustee
		
	By:	 	                    
	Title:	 	Authorized Signatory

 [Form of Reverse] 

This Note is one of a duly authorized issue of securities of the Company (herein called the “Securities”), issued and to be
issued in one or more series under an Indenture, dated as of November 10, 2020 (the “Base Indenture”), between the Company and U.S. Bank National Association, as Trustee (herein called the “Trustee”, which term
includes any successor trustee under the Indenture), as supplemented by a first supplemental indenture, dated as of November 10, 2020 (the “First Supplemental Indenture”) and an Officer’s Certificate, dated as of
November 10, 2020 (the “Officer’s Certificate, and together with the Base Indenture and First Supplemental Indenture, the “Indenture”), to which Indenture and all indentures supplemental thereto reference is
hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated
and delivered. This Note is one of the series designated on the face hereof, subject to the Company’s right from time to time, without giving notice to or seeking the consent of the holders of the Securities, to issue an unlimited amount of
additional securities in one or more series having the same terms as the Securities other than the issue date, issue price and the payment of interest accruing prior to the issue date of the additional securities, or the first payment of interest
following the issue date of such additional securities, provided that if such additional securities are not fungible with the then-outstanding Securities for U.S. federal income tax purposes, the additional securities shall have a separate
CUSIP number. The Securities of this series are issuable as Securities only in registered form, without coupons in denominations of $2,000, and any integral multiple of $1,000 in excess thereof. As provided in the Indenture and subject to certain
limitations therein set forth, Securities of this Series are exchangeable for a like aggregate principal amount of Securities of this Series and of like tenor of any authorized denominations, as requested by the Holder surrendering the same, upon
surrender of the Note or Securities to be exchanged at any office or agency described below where Securities of this series may be presented for registration of transfer. 

This Note is subject to the covenants contained in the Base Indenture and certain additional covenants contained in the First Supplemental
Indenture and the Officer’s Certificate. 
 At any time prior to September 15, 2030 (the “Par Call Date”) (which
is three months prior to the maturity date of the notes), the Company may redeem this Note, in whole or from time to time in part, at a redemption price equal to the greater of the following amounts, plus, in each case, accrued and unpaid interest
thereon to the Redemption Date: (i) 100% of the principal amount to be redeemed; and (ii) the sum of the present values of the remaining scheduled payments of principal and interest. In determining the present values of the remaining
scheduled payments, such payments shall be discounted to the Redemption Date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) using a
discount rate equal to the Treasury Rate plus 0.25% (the “Make-Whole Amount”). For the avoidance of doubt, the Trustee, acting in any capacity, shall have no obligation to make any calculation in connection with the Par Call Date,
and no responsibility or liability for any such calculation made by any other party. 
 At any time on or after the Par Call Date, the
Company may redeem this Note, in whole or from time to time in part, at a redemption price equal 100% of the aggregate principal amount to be redeemed plus accrued and unpaid interest, if any, to, but excluding, the Redemption Date 

 Notwithstanding the foregoing, installments of interest on the Notes that are due and
payable on Interest Payment Dates falling on or prior to a Redemption Date will be payable on the relevant Interest Payment Date to the Holders of such Notes as of the close of business on the Regular Record Date immediately preceding such Interest
Payment Date. The redemption price will be calculated on the basis of a 360-day year consisting of twelve 30-day months. 

No notes of a principal amount of $2,000 or less shall be redeemed in part. If notice has been given as provided in the Indenture and funds
for the redemption of this Note or any part thereof called for redemption shall have been made available on the Redemption Date, this Note or such part thereof shall cease to bear interest on the Redemption Date and the only right of the Holder
shall be to receive payment of the redemption price. Notice of any optional redemption of any Notes shall be given to the Holder hereof (in accordance with the provisions of the Indenture), not more than 60 nor less than 10 days prior to the
Redemption Date. The notice of redemption shall specify, among other things, the redemption price and the aggregate principal amount of Notes to be redeemed. The notice of redemption may be conditional in that the Company may, notwithstanding the
giving of the notice of redemption, condition the redemption of the Notes specified in the notice of redemption upon the completion of other transactions, such as refinancings or acquisitions (whether of the Company or by the Company). In the event
of redemption of this Note in part only, a new Note of like tenor for the unredeemed portion hereof and otherwise having the same terms and provisions as this Note shall be issued by the Company in the name of the Holder hereof upon the presentation
and surrender hereof. 
 “Comparable Treasury Issue” means the United States Treasury security or securities selected by an
Independent Investment Banker as having an actual or interpolated maturity comparable to the remaining term of the Note (assuming that such Note matured on the Par Call Date) that would be utilized, at the time of selection and in accordance with
customary financial practice, in pricing new issues of corporate debt securities of a comparable maturity to the remaining term of the Note (assuming that such Note matured on the Par Call Date). 

“Comparable Treasury Price” means, with respect to any Redemption Date, (1) the average of the Reference Treasury Dealer
Quotations for such Redemption Date after excluding the highest and lowest of such Reference Treasury Dealer Quotations, (2) if the Company obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such quotations or
(3) if only one Reference Treasury Dealer Quotation is received, such quotation. 
 “Independent Investment Banker”
means one of the Reference Treasury Dealers, appointed by us. 
 “Redemption Date” means, with respect to the Notes of each
series, any date fixed for redemption by or pursuant to the Indenture and such Notes. 
 “Reference Treasury Dealer” means
BofA Securities, Inc. and J.P. Morgan Securities LLC and their respective affiliates, and their respective successors and up to two other nationally recognized investment banking firms that are primary U.S. government securities dealers in the City
of New York (a “Primary Treasury Dealer”) as selected by the Parent Guarantor. If any of the foregoing or their affiliates shall cease to be a Primary Treasury Dealer, the Company shall substitute therefor another Primary Treasury
Dealer. 

 “Reference Treasury Dealer Quotations” means, with respect to each
Reference Treasury Dealer and any Redemption Date, the average, as determined by the Company, of the bid and ask prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the
Company by such Reference Treasury Dealer at 3:30 p.m. (New York City time) on the third Business Day preceding such Redemption Date. 

“Remaining Scheduled Payments” means, with respect to each Note to be redeemed, the remaining scheduled payments of principal
of and interest on the Note that would be due after the related Redemption Date (calculated as if such Note matured on the Par Cal Date) but for the redemption. If that Redemption Date is not an interest payment date with respect to the Note, the
amount of the next succeeding scheduled interest payment on the Note shall be reduced by the amount of interest accrued on the Note to the Redemption Date. 

“Treasury Rate” means, with respect to any Redemption Date, the rate per annum equal to the semi-annual equivalent yield to
maturity or interpolation (on a day count basis) of the interpolated Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such
Redemption Date. 
 The Notes shall not be entitled to the benefit of any sinking fund. The Company may, at any time and from time to time,
repurchase the Notes in the open market.If a Change of Control Triggering Event occurs, unless the Company has exercised its right to redeem the Notes as described in Article 11, the Company shall be required to make an offer (the “Change of
Control Offer”) to each Holder of Notes to repurchase all or, at the Holder’s option, any part (equal to $2,000 or an integral multiple of $1,000 in excess thereof) of that Holder’s Notes on the terms set forth in the Notes. In
the Change of Control Offer, the Company shall be required to offer payment in cash equal to 101% of the aggregate principal amount of Notes repurchased, plus accrued and unpaid interest, if any, on the Notes repurchased to, but not including, the
date of repurchase (the “Change of Control Payment”). Within 30 days following any Change of Control Triggering Event, a notice shall be mailed or electronically delivered to Holders of the Notes describing the transaction or
transactions that constitutes or may constitute the Change of Control Triggering Event and offering to repurchase the Notes on the date specified in the notice, which date shall be no earlier than 30 days and no later than 60 days from the date such
notice is mailed or electronically delivered (the “Change of Control Payment Date”). The notice shall, if mailed or electronically delivered prior to the date of consummation of the Change of Control, state that the offer to
purchase is conditioned on the Change of Control Triggering Event occurring on or prior to the Change of Control Payment Date. 
 In order
to accept the Change of Control Offer, the Holder must deliver to the Paying Agent, at least five Business Days prior to the Change of Control Payment Date, this Note together with the form entitled “Election Form” (which form is annexed
to this Note) duly completed, or a facsimile transmission or a letter from a member of a national securities exchange, or the Financial Industry Regulatory Authority or a commercial bank or trust company in the United States setting forth: 

 

	 	(a)	 the name of the Holder of this Note; 

	 	(b)	 the principal amount of this Note; 

 

	 	(c)	 the principal amount of this Note to be repurchased; 

 

	 	(d)	 the certificate number or a description of the tenor and terms of this Note; 

 

	 	(e)	 a statement that the Holder is accepting the Change of Control Offer; and 

 

	 	(f)	 a guarantee that this Note, together with the form entitled “Election Form” duly completed, shall be
received by the Paying Agent at least five Business Days prior to the Change of Control Payment Date. 

 Any exercise by a
Holder of its election to accept the Change of Control Offer shall be irrevocable. The Change of Control Offer may be accepted for less than the entire principal amount of this Note, but in that event the principal amount of this Note remaining
outstanding after repurchase must be equal to $2,000 or an integral multiple of $1,000 in excess thereof. 
 On the Change of Control
Payment Date, the Company shall, to the extent lawful: 
  

	 	(a)	 accept for payment all Notes or portions of Notes properly tendered pursuant to the Change of Control Offer;

  

	 	(b)	 deposit with the Paying Agent an amount equal to the Change of Control Payment in respect of all Notes or
portions of Notes properly tendered; and 

  

	 	(c)	 deliver or cause to be delivered to the Trustee the Notes properly accepted together with an Officer’s
Certificate stating the aggregate principal amount of Notes or portions of Notes being repurchased. 

 The Company shall
not be required to make a Change of Control Offer upon the occurrence of a Change of Control Triggering Event if (i) a third party makes such an offer in the manner, at the times and otherwise in compliance with the requirements for an offer
made by the Company and the Guarantor and the third party repurchases all Notes properly tendered and not withdrawn under its offer or (ii) a notice of redemption relating to the redemption of all of the Notes has been given pursuant to the
Indenture as described above under Clause 4 above and, in the event that such redemption is subject to one or more conditions precedent, such conditions have been satisfied or waived. In the event that such third party terminates or defaults its
offer, the Company will be required to make a Change of Control Offer treating the date of such termination or default as though it were the date of the Change of Control Triggering Event. Notwithstanding anything to the contrary herein, a Change of
Control Offer may be made in advance of a Change of Control Triggering Event, conditional upon such Change of Control Triggering Event, if a definitive agreement is in place for the Change of Control at the time of making the Change of Control
Offer. 
 At the time the Company delivers Notes to the Trustee which are to be accepted for repurchase, the Company shall also deliver an
Officer’s Certificate stating that such Notes are to be accepted by the Company pursuant to and in accordance with the terms hereof. A Note shall be deemed to have been accepted for repurchase at the time the Trustee, directly or through an
agent, mails or delivers payment therefor to the surrendering Holder. 

 Prior to any Change of Control Offer, the Company shall deliver to the Trustee an
Officer’s Certificate stating that all conditions precedent contained herein to the right of the Company to make such offer have been complied with. 

The Company and the Guarantors shall comply with the requirements of Rule 14e-1 under the Exchange Act
and any other securities laws and regulations thereunder, to the extent those laws and regulations are applicable in connection with the repurchase of the Notes as a result of a Change of Control Triggering Event. To the extent that the provisions
of any such securities laws or regulations conflict with the Change of Control Offer provisions of the Notes, the Company and the Guarantors shall comply with those securities laws and regulations and shall not be deemed to have breached their
obligations under the Change of Control Offer provisions of the Notes by virtue of any such conflict. 
 “Change of
Control” means the occurrence of any one of the following: (1) the direct or indirect sale, lease, transfer, conveyance or other disposition (other than by way of merger, amalgamation, arrangement or consolidation), in one or a series
of related transactions, of all or substantially all of the properties or assets of the Parent Guarantor and its subsidiaries, taken as a whole, to one or more Persons, other than to the Parent Guarantor or one of its subsidiaries; (2) the
Company becomes aware of the consummation of any transaction including, without limitation, any merger, amalgamation, arrangement or consolidation the result of which is that any Person becomes the beneficial owner, directly or indirectly, of more
than 50% of the Parent Guarantor’s Voting Stock (as defined below); (3) the Parent Guarantor consolidates with, or merges with or into, any Person, or any Person consolidates with, or merges with or into, the Parent Guarantor, in any such
event pursuant to a transaction in which any of the outstanding Voting Stock of the Parent Guarantor or of such other Person is converted into or exchanged for cash, securities or other property, other than any such transaction where the shares of
the Parent Guarantor’s Voting Stock outstanding immediately prior to such transaction constitute, or are converted into or exchanged for, a majority of the Voting Stock of the surviving Person immediately after giving effect to such
transaction; or (4) the adoption of a plan relating to the liquidation or dissolution of the Parent Guarantor. For the purposes of this definition, “Person” and “beneficial owner” have the meanings used in Section 13(d)
of the Exchange Act. 
 “Change of Control Triggering Event” means the Notes cease to be rated Investment Grade by both
Rating Agencies on any date during the period (the “Trigger Period”) commencing on the first public announcement of the Change of Control and ending 60 days following consummation of such Change of Control, which Trigger Period
shall be extended following consummation of a Change of Control for so long as any of the Rating Agencies has publicly announced that it is considering a possible ratings change; provided that if a Rating Agency making such a reduction in
rating publicly announces or confirms or informs the Trustee in writing at the Company’s request that the reduction was not the result, in whole or in part, of any event or circumstance comprised of, or in respect of, the Change of Control
(whether or not the applicable Change of Control has occurred at such time) no Change of Control Triggering Event shall be deemed to have occurred. Unless at least one Rating Agency is providing a rating for the Notes at the commencement of any
Trigger Period, the Notes shall be deemed to have ceased to be rated Investment Grade during that Trigger Period. Notwithstanding the foregoing, no Change of Control Triggering Event shall be deemed to have occurred in connection with any particular
Change of Control unless and until such Change of Control has actually been consummated. 

 “Investment Grade” means a rating equal to or higher than Baa3 (or the
equivalent) by Moody’s or BBB- (or the equivalent) by S&P and the equivalent investment grade credit rating from any replacement Rating Agency or Rating Agencies selected by the Parent Guarantor. 

“Moody’s” means Moody’s Investors Service, Inc., a subsidiary of Moody’s Corporation, and its successors. 

“Rating Agencies” means (1) each of Moody’s and S&P; and (2) if any of the Rating Agencies ceases to
provide rating services to issuers or investors, and no Change of Control Triggering Event has occurred or is occurring, a “nationally recognized statistical rating organization” within the meaning of Rule
15c3-1(c)(2)(vi)(F) under the Exchange Act that is selected by the Parent Guarantor (as certified by a resolution of its Board of Directors) as a replacement for Moody’s or S&P, or both of them, as
the case may be. 
 “S&P” means Standard & Poor’s Rating Services, a division of The McGraw-Hill
Companies, Inc., and its successors. 
 “Voting Stock” of any specified Person as of any date means the Capital Stock of
such Person that is at the time entitled to vote generally in the election of the Board of Directors of such Person. 
 Partial redemption
must be made in an amount not less than U.S. $2,000 or in integral multiples of $1,000 in excess thereof. 
 Notice of redemption will be
given by mail to Holders of Securities, not more than 60 days nor less than 10 days prior to the date fixed for redemption, all as provided in the Indenture. 

In the event of redemption of this Note in part only, a new Note or Securities of this series and of like tenor for the unredeemed portion
hereof will be issued in the name of the Holder hereof upon the cancellation hereof. 
 Subject to certain conditions set forth in the
Indenture, the Company at any time may discharge or defease some of or all its obligations under this Note and the Indenture in accordance with Section 4.03 of the Indenture. 

If an Event of Default with respect to Securities of this series shall occur and be continuing, the principal of the Securities of this series
may be declared due and payable in the manner and with the effect provided in the Indenture. 

 The Indenture permits, with certain exceptions as therein provided, the amendment thereof
and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each series to be affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders of a
majority in principal amount of the Securities at the time Outstanding of each series to be affected. The Indenture also contains provisions permitting the Holders of specified percentages in principal amount of the Securities of each series at the
time Outstanding (with each series voting as a separate class in certain cases specified in the Indenture, or with all series voting as one class, in certain other cases specified in the Indenture), on behalf of the Holders of all Securities of such
series, to waive compliance by the Company with certain provisions of the Indenture and certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this Note shall be conclusive and binding upon such
Holder and upon all future Holders of this Note and of any Note issued upon the registration of transfer hereof or in exchange herefor or in lieu hereof, whether or not notification of such consent or waiver is made upon this Note. 

As set forth in, and subject to, the provisions of the Indenture, no Holder of any Note of this series will have any right to institute any
proceeding with respect to the Indenture or for any remedy thereunder, unless such Holder shall have previously given to the Trustee written notice at the Corporate Trust Office of a continuing Event of Default with respect to this series, the
Holders of not less than 25% in principal amount of the Outstanding Securities of this series and all other affected series shall have made written request to the Trustee to institute such proceeding as trustee (and offered security or indemnity
satisfactory to the Trustee), and the Trustee shall not have received from the Holders of a majority in principal amount of the Outstanding Securities of all affected series a direction inconsistent with such request and shall have failed to
institute such proceedings within 60 days; provided, however, that such limitations do not apply to a suit instituted by the Holder hereof for the enforcement of payment of the principal of (and premium, if any) or interest on this Note on or
after the respective due dates expressed herein. 
 No reference herein to the Indenture and no provision of this Note or of the Indenture
shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of (and premium, if any) and interest (including additional amounts, as described on the face hereof) on this Note at the times, place and
rate, and in the coin or currency, herein prescribed. 
 As provided in the Indenture and subject to certain limitations therein set forth,
the transfer of this Note is registrable in the Security Register, upon surrender of this Note for registration of transfer at the office or agency of the Company in any place where the principal of (and premium, if any) and any interest on such
Note are payable, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one
or more new Securities of this series and of like tenor, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees. The Company and the Trustee shall be entitled to request an
opinion of counsel providing that the transfer complies with applicable securities laws. 
 No service charge shall be made for any such
registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith. 

 Prior to due presentment of this Note for registration of transfer, the Company, the Trustee
and any agent of the Company or the Trustee may treat the Person in whose name this Note is registered as the owner hereof for all purposes, whether or not this Note is overdue, and neither the Company, the Trustee nor any such agent shall be
affected by notice to the contrary. 
 Notwithstanding anything in the Indenture or in the terms of this Note to the contrary, the exchange
of this Note for a Note will be subject to satisfaction of the provisions of the United States tax laws in effect at the time of the exchange. Neither the Company nor the Trustee nor any agent of the Company or the Trustee shall be required to
exchange this Note for a Note if (i) as a result thereof and in the Company’s judgment, the Company would incur adverse consequences under then applicable United States Federal income tax laws and (ii) in the case of the Trustee or
any agent of the Company or the Trustee, the Company shall have delivered to such Person an Officer’s Certificate and an Opinion of Counsel as to the matters set forth in clause (i) above. 

The Indenture and the Securities shall be governed by and construed in accordance with the laws of the State of New York. 

All terms used in this Note which are defined in the Indenture shall have the meanings assigned to them in the Indenture. 

 ANNEX A 

ELECTION FORM 
 TO BE
COMPLETED ONLY IF THE HOLDER 
 ELECTS TO ACCEPT THE CHANGE OF CONTROL OFFER 

The undersigned hereby irrevocably requests and instructs the Company to repurchase the relevant Note (or the portion thereof specified below), pursuant to
its terms, on the Change of Control Payment Date specified in the Change of Control Offer, for the Change of Control Payment specified in the within Note, to the undersigned,
                                 , at
                                 (please print or typewrite name and address of the
undersigned). 
 For this election to accept the Change of Control Offer to be effective, the Company must receive, at the address of the Paying Agent set
forth below or at such other place or places of which the Company shall from time to time notify the Holder of the relevant Note, either (i) this Note with this “Election Form” form duly completed, or (ii) a telegram, telex,
facsimile transmission or a letter from a member of a national securities exchange or the Financial Industry Regulatory Authority, Inc. or a commercial bank or a trust company in the United States setting forth (a) the name of the Holder of the
Note, (b) the principal amount of the Note, (c) the principal amount of the Note to be repurchased, (d) the certificate number or description of the tenor and terms of the Note, (e) a statement that the option to elect repurchase
is being exercised, and (f) a guarantee stating that the Note to be repurchased, together with this “Election Form” duly completed will be received by the Paying Agent five Business Days prior to the Change of Control Payment Date.
The address of the Paying Agent is U.S. Bank National Association, Global Corporate Trust Services, 1349 W. Peachtree St. NW, Ste. 1050, Atlanta, GA 30309. 

If less than the entire principal amount of the relevant Note is to be repurchased, specify the portion thereof (which principal amount must be $2,000 or an
integral multiple of $1,000 in excess thereof) which the Holder elects to have repurchased: $                . 

 

	
	  
 Name:

	Address:
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 Date: ___________________

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