Document:

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                                                                    EXHIBIT 10.6

                              PUT OPTION AGREEMENT

         THIS PUT OPTION AGREEMENT, dated as of November 30, 2001 by and between
NATIONAL SERVICE INDUSTRIES, INC., a California corporation ("Landlord") and
ACUITY BRANDS, INC., a Delaware corporation ("Tenant").

         In order to induce Landlord to enter into that certain Lease Agreement
dated of even date herewith by and between Landlord and Tenant (the "Lease"),
Tenant has agreed to grant to Landlord the right to require Tenant to purchase
the "Property" (as hereinafter defined), subject to the terms and conditions of
this Agreement, and the parties desire to provide for said option on the terms
and conditions hereinafter set forth.

         NOW, THEREFORE, for and in consideration of TEN AND NO/100 DOLLARS
($10.00) paid by Landlord to Tenant, the execution of the Lease, the foregoing
premises, the mutual covenants and agreements set forth herein, and other good
and valuable consideration, all of which each party respectively agrees
constitutes sufficient consideration received at or before the execution hereof,
the parties hereto do hereby agree as follows:

         1.       DEFINITIONS AND MEANINGS.

         1.1      Definitions. In addition to any other terms whose definitions
are fixed and defined by this Agreement, each of the following defined terms,
when used in this Agreement with an initial capital letter, shall for purposes
of this Agreement have the meaning ascribed thereto by this Paragraph 1:

                  1.1.1    "Agreement" means this Put Option Agreement, together
         with all exhibits attached hereto.

                  1.1.2    "Closing" means the consummation of the purchase and
         sale of the Property contemplated by this Agreement by the deliveries
         required under Paragraph 7 hereof if Landlord exercises the Put Option.

                  1.1.3    "Closing Date" means the time and date, established
         under Paragraph 7 hereof, when the purchase and sale contemplated by
         this Agreement is to be consummated if Landlord exercises the Put
         Option, as such date may be extended by mutual agreement of the parties
         or pursuant to the provisions of this Agreement.

                  1.1.4    "Date of this Agreement" means the date of the Lease.

                  1.1.5    "Exercise Deadline" means the deadline by which
         Landlord must exercise the Put Option, as described in Paragraph 2
         hereof.

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                  1.1.6    "Existing Exceptions" means the encumbrances which
         affect Landlord's title to the Property and which are set forth in
         Exhibit B attached hereto, together with the Lease itself, together
         with such additional encumbrances on the title to the Property as are
         created by or at the request or with the consent of Tenant in
         accordance with the terms of the Lease, exclusive, however, of any
         mortgage, liens, deeds to secure debt or other loan documents
         encumbering fee title to the Property.

                  1.1.7    "Permitted Exceptions" means (a) the Existing
         Exceptions (other than any liens, mortgages, deeds to secure debt, or
         other loan documents encumbering fee title to the Property which shall
         be satisfied and canceled of record on or before the Closing) and any
         matters affecting title to the Property approved by Tenant in writing
         pursuant to Section 4.1 of this Agreement; (b) all other matters
         affecting title approved in writing by Tenant, and (c) ad valorem taxes
         for the calendar year of Closing not yet due and payable.

                  1.1.8    "Property" means that tract or parcel of land, as
         more particularly described in Exhibit "A" to this Agreement, attached
         hereto and made a part hereof by this reference, together with all
         appurtenances, rights, easements, rights-of-way, tenements and
         hereditaments incident thereto.

                  1.1.9    "Purchase Price" means the amount to be paid by
         Tenant to Landlord for the Property as provided in Paragraph 3 hereof.

                  1.1.10   "Put Option" means the option granted to Landlord to
         require Tenant to purchase the Property pursuant to Paragraph 2 hereof
         and the provisions of this Agreement.

                  1.1.11   "Survey" means the boundary survey of the Property
         prepared at Tenant's expense as provided in Paragraph 5 hereof.

                  1.1.12   "Title Objection" and "Title Objections" mean any
         deeds to secure debt, mortgages, deeds of trust, liens, financing
         statements, security interests, easements, leases, restrictive
         covenants, agreements, options, and other encumbrances which affect
         Landlord's title to the Property or impair the marketability of
         Landlord's title to the Property, excluding, however, the Existing
         Exceptions.

         2.       GRANT OF OPTION. Tenant hereby grants to Landlord the right
and option to require Tenant to purchase the Property pursuant to the terms and
conditions of this Agreement (said option being herein referred to as the "Put
Option"). The Put Option shall be exercisable by Landlord giving written notice
(the "Exercise Notice") to Tenant at any time after June 1, 2002 but no later
than May 31, 2003 (said exercise deadline is hereinafter referred to as the
"Exercise Deadline"). In the event Landlord fails to give written notice to
Tenant on or before the Exercise Deadline, then the Put Option and this
Agreement shall terminate and be of no further force and effect. In the event
the Put Option is exercised by Landlord pursuant to the

                                      -2-
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provisions of this Paragraph 2, then the provisions of this Agreement relating
to the Put Option shall be in force and effect, and Landlord shall sell and
Tenant shall buy the Property pursuant to such terms and conditions.

         3.       PURCHASE PRICE. In the event that Landlord exercises the Put
Option, the Purchase Price of the Property shall be Eighteen Million Seven
Hundred Thousand Dollars and 00/100 ($18,700,000) (the "Purchase Price"). At
Closing under the Put Option, Tenant shall pay the Purchase Price by cash,
federal funds check, federal funds wire transfer or cashier's check drawn on a
metropolitan Atlanta, Georgia bank. Provided Landlord has not otherwise become
entitled to the same pursuant to the Lease prior to the Closing, Tenant shall
receive a credit against the Purchase Price equal to any prepaid rent, prorated
as of the Closing Date.

         4.       TITLE EXAMINATION AND OBJECTIONS.

                  4.1      Title Examination and Policy. Landlord shall be
         obligated to deliver title to the Property to Tenant such that Tenant's
         title company, selected by Tenant and approved by Landlord, which
         approval shall not be unreasonably withheld (the "Title Company") shall
         be willing to insure Tenant's title to the Property in the amount of
         the Purchase Price on the then standard Georgia form of Owner's title
         insurance insuring marketability of title, subject only to the
         Permitted Exceptions. Tenant shall have the title to the Property
         examined and give written notice to Landlord within thirty (30) days
         following Tenant's receipt of the Exercise Notice of any Title
         Objections disclosed by such initial examination or by a survey of the
         Property other than the Existing Exceptions. If Tenant fails to give
         any such notice with respect to any Title Objections which appear of
         record, then Tenant shall be deemed to have waived such Title
         Objections. Thereafter, Tenant may re-examine the title to the Property
         and may have surveys prepared or updated at any time and from time to
         time up to and through the Closing Date and may give Landlord written
         notice of any additional Title Objections which appear of record after
         the Exercise Deadline.

                  4.2      Failure to Correct Title Objections. In the event
         Landlord fails to satisfy or correct on or before the Closing Date any
         Title Objection of which Landlord is notified, as provided above in
         Paragraph 4.1, the Closing Date shall be extended for five (5) days and
         prior to the expiration of such five (5) day extension Tenant may elect
         by written notice to Landlord one of the following:

                           4.2.1    To waive such Title Objection and to close
                  the transaction in accordance with the terms of this
                  Agreement; provided, however, that with respect to any Title
                  Objection that constitutes a monetary lien (including any deed
                  to secure debt, mortgage, deed of trust or other security
                  interest), Landlord shall be required to deposit in escrow
                  with the Title Company (failing which Tenant may deposit with
                  the Title Company out of the sales proceeds that would
                  otherwise be payable to Landlord and receive a credit for the
                  same against the Purchase Price) such amount as the Title
                  Company shall reasonably

                                       -3-

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                  estimate to be necessary to satisfy or to remove such Title
                  Objection so that the Title Company will insure over such
                  Title Objection and Landlord shall thereafter diligently
                  endeavor (which may include paying any additional sums as may
                  be necessary) to have such Title Objection so satisfied or
                  removed pursuant to the terms of an escrow agreement to be
                  entered into at the Closing between Landlord, Tenant, and the
                  Title Company.

                           4.2.2    To elect not to purchase the Property, in
                  which event neither Landlord nor Tenant shall have any further
                  rights, duties, or obligations under this Agreement with
                  respect to the Property.

         5.       SURVEY. Tenant may, at Tenant's expense, have the Property
accurately surveyed by a Georgia licensed surveyor or engineer reasonably
acceptable to Landlord to show the actual boundaries of the Property. Upon
receipt of such survey, Tenant shall promptly deliver a print of such survey to
Landlord, and such survey shall constitute the "Survey" hereunder.

         6.        THE CLOSING.

         6.1      Closing Date. The Closing shall be held at 2:00 p.m. on the
forty-fifth (45th) day after Tenant receives the Exercise Notice, at the offices
of King & Spalding, 191 Peachtree Street, N.E., Atlanta, Georgia 30303-1763, or
at such earlier time and date and at such other location in the Atlanta,
Georgia, area as the parties shall agree.

         6.2      Deliveries At Closing. On the Closing Date, the Closing shall
occur as follows, subject to satisfaction of all of the terms and conditions of
this Agreement:

                  6.2.1    Landlord shall convey good and marketable title to
         the Property to Tenant, without exception for any Title Objections
         other than the Permitted Exceptions, by limited warranty deed
         containing warranties of title, excepting only the Permitted Exceptions
         from such warranty, duly executed, witnessed, and notarized and in
         recordable form.

                  6.2.2    Landlord shall deliver to Tenant an affidavit
         addressing such matters the Title Company shall reasonably require in
         order to insure Tenant's good and marketable title to the Property.

                  6.2.3    Landlord shall deliver to Tenant copies of such
         surveys, site plans, and plans and specifications relating to the
         Property as are in the possession of Landlord or to which Landlord has
         reasonable access.

                  6.2.4    Landlord shall deliver to Tenant either (i) a
         certificate duly executed by Landlord and certifying that Landlord is
         not a foreign person for purposes of the Foreign Investment in Real
         Property Tax Act (hereinafter referred to as "FIRPTA"), as amended
         through the date of Closing, or (ii) a withholding certificate from the
         Internal Revenue

                                       -4-

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         Service to the effect that Landlord is exempt from withholding tax on
         the Purchase Price under FIRPTA. If neither of the above certificates
         is delivered, Tenant shall, at Closing, deduct and withhold such tax
         amounts as are required under FIRPTA.

                  6.2.5    Landlord shall deliver to Tenant a certificate in
         accordance with O.C.G.A. ss. 48-7-128, duly executed by Landlord and
         certifying that Landlord is a resident of the State of Georgia or is
         otherwise exempt from Georgia withholding tax.

                  6.2.6    Concurrently with Landlord's deliveries at the
         Closing, Tenant shall pay to Landlord the Purchase Price as provided in
         Paragraph 3.

         6.3      Closing Costs. At the Closing, Landlord shall pay any transfer
taxes, documentary stamp fees or other similar taxes or fees imposed in
connection with the transfer of the Property and/or the recording of the deed.
In addition, Landlord and Tenant shall respectively pay the following costs and
expenses:

                  6.3.1    Tenant shall pay (a) rent under the Lease prorated
         through the date of Closing, (b) the fees and expenses of Tenant's
         attorneys, (c) all recording and filing fees for all recordable
         instruments executed and delivered by Landlord or Tenant at the Closing
         pursuant to the terms hereof, (d) title examination fees or charges
         incurred by Tenant, (e) premiums for any owner's or lender's title
         insurance policy or policies obtained by Tenant, (f) the cost of
         Survey, and (g) any other costs and expenses actually incurred by
         Tenant.

                  6.3.2    Landlord shall pay (a) the Georgia real estate
         transfer tax applicable to the transaction, (b) the fees and expenses
         of Landlord's attorneys and (c) any other costs and expenses actually
         incurred by Landlord.

         7.        CONDEMNATION.

         7.1      Condemnation. In the event of any Taking that materially
interferes with the use of the Property at that time, at any time after the
Exercise Notice and prior to the Closing Date, then Tenant shall have the
option, exercisable by notice to Landlord within thirty (30) days after
receiving notice from Landlord of such event, to terminate this Agreement
notwithstanding any prior exercise of the Put Option, provided that in the
absence of such an election by Tenant this Agreement shall continue in full
force and effect, the Purchase Price shall not be reduced, and Landlord at
Closing shall pay over to Tenant all condemnation awards collected by Landlord
and shall assign to Tenant all rights of Landlord in any uncollected
condemnation award.

         7.2      Notice of Condemnation or Casualty. Landlord shall notify
Tenant upon Landlord's receiving notice of the occurrence or existence of any
damage, destruction, condemnation, or threat of condemnation affecting the
Property.

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         8.       NO BROKER. Tenant and Landlord represent and warrant to each
other that they have not discussed this Agreement or the subject matter hereof
with any real estate broker, agent, or salesman, so as to create any legal right
in any such broker, agent, or salesman to claim a real estate commission or
similar fee with respect to the conveyance of the Property and the other
transactions contemplated by this Agreement. Tenant and Landlord hereby
indemnify each other against, and agree to hold, save, and defend each other
harmless from, any liability or claim (and all expenses, including attorney's
fees, incurred in defending any such claim or in enforcing this indemnity) for a
real estate brokerage commission or similar fee or compensation arising out of
or in any way connected with any claimed agency or cooperative relationship with
the indemnitor and relating to this Agreement or the purchase and sale of the
Property. The foregoing indemnity shall survive the recision, cancellation,
termination, or consummation of this Agreement.

         9.        DEFAULT.

         9.1      Landlord Default. If, after the exercise of the Put Option,
the purchase and sale of the Property contemplated by this Agreement is not
consummated on account of a Landlord Default, then Tenant shall have the right
to pursue any and all rights and remedies available to Tenant at law, in equity,
or under this Agreement, including, without limitation, the right to seek
specific performance of this Agreement against Landlord.

         9.2      Tenant Default. If, after the exercise of the Put Option, the
purchase and sale of the Property contemplated by this Agreement is not
consummated because of a Tenant Default, then Landlord shall have right to
pursue any and all rights available to Landlord at law, in equity, or under this
Agreement, including, without limitation, the right to seek specific performance
of this Agreement against Tenant. Notwithstanding anything to the contrary
contained in this Agreement or the Lease, a Tenant Default shall under no
circumstances be or give rise to an Event of Default under the Lease, and the
Lease shall remain in full force and effect following a Tenant Default.

         9.3      Definition of Landlord Default. "Landlord Default" means the
default or failure or refusal of Landlord to perform under this Agreement, and
the continuance of such default, failure or refusal to perform for fifteen (15)
days after Tenant has given Landlord Notice of such default or failure or
refusal to perform.

         9.4      Definition of Tenant Default. "Tenant Default" means Tenant's
default or failure or refusal to perform under this Agreement, and the
continuance of such default or failure or refusal to perform for fifteen (15)
days after Tenant has given Landlord Notice of such failure.

         10.      TERMINATION OF LEASE. Notwithstanding anything contained in
this Agreement or the Lease to the contrary, in the event Tenant suffers or
causes a default past applicable notice and cure periods under the Lease and
Landlord terminates the Lease as a result

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of such default, then this Agreement shall terminate and be of no further force
and effect from and after the date of such termination of the Lease.

         11.       MISCELLANEOUS.

         11.1     Governing Law. This Agreement shall be construed, interpreted
and enforced in accordance with the laws of the State of Georgia.

         11.2     Notices. Any notice, request or other communication (a
"notice") required or permitted to be given hereunder shall be in writing and
shall be delivered by hand delivery, by reputable courier (such as United Parcel
Service or Federal Express), by telecopy or mailed by United States registered
or certified mail, return receipt requested, postage prepaid and addressed to
each party at its address as first set forth below. Any such notice shall be
considered given on the date of (i) such hand delivery, (ii) deposit with such
courier for same day or next business day delivery, (iii) actual receipt of
telecopy or (iv) deposit in the United States mail, but the time period (if any
is provided herein) in which to respond to such notice shall commence on the
date of hand or courier delivery or on the date received following telecopy or
deposit in the United States mail as provided above. Rejection or other refusal
to accept or inability to deliver because of changed address of which no notice
was given shall be deemed to be receipt of the notice. By giving at least five
(5) days' prior written notice thereof, any party may from time to time and at
any time change its mailing address hereunder. Any notice, request or other
communication hereunder of any party may be given by such party's counsel.

                                    Landlord:
                                    --------

                                    National Service Industries, Inc.
                                    1420 Peachtree Street, N.E.
                                    Atlanta, Georgia  30309-3002
                                    Attn:  General Counsel
                                    Telecopy No.: 404-853-1015

                                    Tenant:
                                    ------

                                    Acuity Brands, Inc.
                                    1420 Peachtree Street, N.E.
                                    Atlanta, Georgia 30309-3002
                                    Attn:  General Counsel
                                    Telecopy No.:  404-853-1415

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         11.3     Entire Agreement; Modification. This Agreement supersedes all
prior discussions and agreements between Landlord and Tenant with respect to the
Put Option and contains the sole and entire understanding between Landlord and
Tenant with respect to the Put Option. All promises, inducements, offers,
letters of intent, solicitations, agreements, commitments, representations and
warranties heretofore made between such parties with regard to the Put Option
are merged into this Agreement. This Agreement shall not be modified or amended
in any respect except by a written instrument executed by or on behalf of each
of the parties to this Agreement.

         11.4     Survival. This Agreement shall not be merged into any of the
instruments or documents executed and delivered at the Closing, but shall
survive the Closing, and the provisions, representations and warranties made
herein shall remain in full force and effect.

         11.5     Exhibits. Each and every exhibit referred to or otherwise
mentioned in this Agreement is attached to this Agreement and is and shall be
construed to be made a part of this Agreement by such reference or other mention
at each point at which such reference or other mention occurs, in the same
manner and with the same effect as if each exhibit were set forth in full and at
length every time it is referred to or otherwise mentioned.

         11.6     Captions. All captions, headings, Article, Section and
subsection numbers and letters and other reference numbers or letters are solely
for the purpose of facilitating reference to this Agreement and shall not
supplement, limit or otherwise vary in any respect the text of this Agreement.

                       [SIGNATURES ON THE FOLLOWING PAGES]

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         IN WITNESS WHEREOF, the parties hereto have duly signed, sealed, and
delivered this Agreement.

                                   LANDLORD:

                                   NATIONAL SERVICE INDUSTRIES, INC.,
                                   a California corporation

                                   By:   /s/ Brock A. Hattox
                                         --------------------------------
                                             Brock A. Hattox
                                             Executive Vice President and
                                                Chief Financial Officer

                                   TENANT:

                                   ACUITY BRANDS, INC.
                                   a Delaware corporation

                                   By:   /s/ James S. Balloun
                                         --------------------------------
                                             James S. Balloun
                                             Chairman, President and
                                                            CEO

                                      -9-<PAGE>
                                                                    EXHIBIT 10.7

                          FIRST SUPPLEMENTAL INDENTURE

                          DATED AS OF OCTOBER 23, 2001

                                       TO

                                    INDENTURE

                          DATED AS OF JANUARY 26, 1999

                       -----------------------------------

                                     BETWEEN

                        NATIONAL SERVICE INDUSTRIES, INC.

                                       AND

                        SUNTRUST BANK, FORMERLY KNOWN AS
                       SUNTRUST BANK, ATLANTA, AS TRUSTEE

                       -----------------------------------

                             SENIOR DEBT SECURITIES

<PAGE>

         FIRST SUPPLEMENTAL INDENTURE, dated as of October 23, 2001 (this "First
Supplemental Indenture"), between NATIONAL SERVICE INDUSTRIES, INC., a Delaware
corporation (said corporation, together with its successors and assigns, herein
referred to as "NSI"), L & C SPINCO, INC., a Delaware corporation (said
corporation, together with its successors and assigns, herein referred to as the
"Company"), L & C LIGHTING GROUP, INC., a Delaware corporation and a wholly
owned subsidiary of the Company (said corporation, together with its successors
and assigns, herein referred to as "Lightco"), THE ZEP GROUP, INC., a Delaware
corporation and a wholly owned subsidiary of the Company (said corporation,
together with its successors and assigns, herein referred to as "Chemco"), and
SUNTRUST BANK, formerly known as SUNTRUST BANK, ATLANTA, a Georgia banking
corporation, as trustee (said corporation, together with its successors and
assigns, herein referred to as the "Trustee").

                              W I T N E S S E T H:

         WHEREAS, NSI and the Trustee entered into an Indenture, dated as of
January 26, 1999 (the "Indenture"), pursuant to which NSI issued its 8.375%
Notes due August 1, 2010 (the "2010 Notes"), and its 6% Notes due 2009 (the
"2009 Notes" and collectively with the 2010 Notes, the "Notes");

         WHEREAS, NSI and its subsidiaries have transferred to the Company all
of the assets comprising NSI's lighting equipment and chemicals businesses in
connection with the transactions contemplated by that certain Agreement and Plan
of Distribution between NSI and the Company (the "Distribution Agreement"),
pursuant to which all the outstanding shares of common stock of the Company will
be distributed to NSI's stockholders (the "Spin-Off");

         WHEREAS, pursuant to Section 801 of the Indenture, NSI may convey,
transfer or lease its properties and assets substantially as an entirety to any
other corporation, partnership or trust organized and existing under the laws of
the United States of America, any state thereof or the District of Columbia;
provided that such Person shall expressly assume, by a supplemental indenture
executed and delivered to the Trustee and in form satisfactory to the Trustee,
the due and punctual payment of the principal of (and premium, if any) and
interest (including any Additional Amounts, if any) on all the Securities and
the performance of every covenant of the Indenture on the part of NSI to be
performed or observed;

         WHEREAS, the Company will assume all the rights and obligations of, and
succeed to and be substituted for, NSI under the Indenture and the Securities;

         WHEREAS, in addition, Lightco and Chemco, jointly and severally with
the Company, will assume the due and punctual payment of the principal of and
interest on the Securities;

         WHEREAS, to evidence the assumption of the obligations under the
Indenture and the Securities by the Company and the release of NSI from its
liabilities and obligations under or with respect to the Notes and the Indenture
in accordance with Sections 801 and 802 of the Indenture, the Company has agreed
to execute and deliver this First Supplemental Indenture;

                                       2

<PAGE>

         WHEREAS, NSI has delivered, or caused to be delivered, to the Trustee,
an Officers' Certificate and an Opinion of Counsel meeting the requirements of
Section 801(c) of the Indenture;

         WHEREAS, NSI and the Trustee have received from the holders of a
majority in principal amount of the 2009 Notes and the holders of a majority in
principal amount of the 2010 Notes a direction and consent to enter into this
First Supplemental Indenture;

         NOW, THEREFORE, in consideration of the above premises, the Company,
Lightco and the Trustee agree, for the benefit of the other, NSI and for the
equal and ratable benefit of the Holders of the Notes, as follows:

                                   ARTICLE I

                            ASSUMPTION OF OBLIGATIONS

         Section 101. Assumption of Obligations under Indenture. The Company
hereby fully and unconditionally assumes the due and punctual payment of the
principal of (and premium, if any) and interest (including any Additional
Amounts, if any) on all the Securities and the performance of every covenant of
the Indenture on the part of NSI to be performed or observed.

         Section 102. Assumption of Notes. Lightco and Chemco, jointly and
severally with the Company, hereby fully and unconditionally assumes the due and
punctual payment of the principal of and interest on the Securities.

                                   ARTICLE II

                             RELEASE OF OBLIGATIONS

         Section 201. Release of NSI from Obligations. The Trustee, on behalf of
the Holders of the Securities, hereby relieves NSI from all covenants and
obligations under the Notes, the Securities, and the Indenture, effective upon
the "Effective Time" (as defined in the Distribution Agreement).

                                  ARTICLE III

                            MISCELLANEOUS PROVISIONS

         Section 301. Terms Defined. For all purposes of this First Supplemental
Indenture, capitalized terms used and not otherwise defined herein shall have
the meanings assigned to such terms in the Indenture.

                                       3

<PAGE>

         Section 302. Effect of Supplemental Indenture. Upon the execution and
delivery of this First Supplemental Indenture by NSI, the Company, Lightco,
Chemco and the Trustee, the Indenture shall be supplemented in accordance
herewith, and this First Supplemental Indenture shall form a part of the
Indenture for all purposes, and every Holder of Securities heretofore or
hereafter authenticated and delivered under the Indenture shall be bound
thereby. In accordance with Section 802 of the Indenture, upon the execution and
delivery of this First Supplemental Indenture by NSI, the Company, Lightco,
Chemco and the Trustee, the Company shall succeed to and be substituted for NSI
with the same effect as if it had been named therein as the party of the first
part and NSI shall be released and relieved as heretofore agreed.

         Section 303. Indenture and Supplemental Indenture Construed Together.
This First Supplemental Indenture is an indenture supplemental to and in
implementation of the Indenture, and the Indenture and this First Supplemental
Indenture shall henceforth be read and construed together.

         Section 304. Confirmation of Indenture. Except as amended by this First
Supplemental Indenture, the Indenture and the Notes are in all respects ratified
and confirmed, and all the terms thereof shall remain in full force and effect.
The Trustee has no responsibility for correctness of the recitals of facts
herein contained, which shall be taken as the statements of NSI and the Company,
and makes no representations as to the validity or sufficiency of this First
Supplemental Indenture and shall incur no liability or responsibility in respect
of the validity thereof.

         Section 305. Conflict with Trust Indenture Act. If any provision of
this First Supplemental Indenture limits, qualifies or conflicts with any
provision of the Trust Indenture Act (the "Act") that is required under the Act
to be part of and govern any provision of this First Supplemental Indenture, the
provision of the Act shall control. If any provision of this Supplemental
Indenture modifies or excludes any provision of the Act that may be so modified
or excluded, the provision of the Act shall be deemed to apply to the Indenture
as so modified or to be excluded by this First Supplemental Indenture, as the
case may be.

         Section 306. Severability. In case any provision in this First
Supplemental Indenture shall be invalid, illegal or unenforceable, the validity,
legality and enforceability of the remaining provisions shall not in any way be
affected or impaired thereby.

         Section 307. Headings. The Article and Section headings of this First
Supplemental Indenture have been inserted for convenience of reference only, are
not to be considered part of this First Supplemental Indenture and shall in no
way modify or restrict any of the terms or provisions hereof.

         Section 308. Benefits of Supplemental Indenture. Nothing in this First
Supplemental Indenture or the Securities, express or implied, shall give to any
Person, other than the parties hereto and thereto and their successors
hereunder, any Authenticating Agent, Paying Agent and Security Registrar, and
the Holders, any benefit of any legal or equitable right, remedy or claim under
the Indenture, this First Supplemental Indenture or the Securities.

                                       4

<PAGE>

         Section 309. Certain Duties and Responsible of the Trustee. In entering
into this First Supplemental Indenture, the Trustee shall be entitled to the
benefit of every provision of the Indenture relating to the conduct of,
affecting the liability of or affording protection to the Trustee, whether or
not elsewhere herein so provided.

         Section 310. Governing Law. THIS SUPPLEMENTAL INDENTURE, THE INDENTURE
AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK, BUT WITHOUT GIVING EFFECT TO APPLICABLE
PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THE APPLICATION OF THE LAWS OF
ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

         Section 311. Successors. All agreements of the Company, NSI, Chemco and
Lightco in this First Supplemental Indenture shall bind their respective
successors and assigns. All agreements of the Trustee in this First Supplemental
Indenture shall bind the Holders of all Securities and all successors and
assigns of the Trustee or such Holders.

         Section 312. Multiple Counterparts. The parties may sign multiple
counterparts of this First Supplemental Indenture. Each signed counterpart shall
be deemed an original, but all of them together represent the same agreement.

         Section 313. Endorsement and Change of Form of Notes. Any Notes
authenticated and delivered after the date of this First Supplemental Indenture
in exchange or substitution for Notes then outstanding and all Notes presented
or delivered to the Trustee on and after that date for such purpose shall
(unless textually revised as hereinafter provided) be stamped or typewritten by
the Trustee with a notation as follows:

         "L&C Spinco, Inc. a Delaware corporation (the "Company"), has
         assumed the obligations of National Service Industries, Inc.
         ("NSI") as successor to the NSI in connection with the transfer
         of the properties and assets of NSI substantially as an
         entirety. The Company has expressly assumed the due and
         punctual payment of the principal of and interest on all the
         Notes and the due and punctual performance and observance of
         all the covenants and obligations in the Indenture to be
         performed by NSI, and NSI will be relieved from all covenants
         and obligations under the Notes, the Securities and the
         Indenture in accordance with the First Supplemental Indenture
         referred to below. The Indenture dated as of January 26, 1999
         referred to in this Note has been amended by a First
         Supplemental Indenture dated as of October 23, 2001 to provide
         for such assumptions of obligations by the Company and the
         release of NSI from such obligations. Reference is hereby made
         to said First Supplemental Indenture, copies of which are on
         file with SunTrust Bank, as Trustee, for a description of the
         amendments therein made."

         Any Notes hereafter authenticated and delivered in exchange or
substitution for Notes then outstanding shall, if the Company so elects, be
textually revised in a form approved by the

                                       5

<PAGE>

Trustee to make reference to the First Supplemental Indenture and to reflect the
supplement of the Indenture hereby instead of being stamped or typewritten as
hereinabove provided.

         Section 314. Effectiveness of First Supplemental Indenture. This First
Supplemental Indenture shall be effective upon the execution and delivery by
NSI, the Company, Lightco, Chemco and the Trustee.

         Section 315. Indemnification of Trustee. The Company, Lightco and
Chemco (collectively, the "Companies" and individually, a "Company"), each
agree, jointly and severally, to indemnify, defend and hold harmless the Trustee
and its officers, directors, employees, agents, counsel, and their respective
successors, assigns, heirs, personal representatives and administrators
(collectively, the "Indemnified Parties") from and against, for and in respect
of, any and all Losses (as hereinafter defined), including, but not limited to,
those which might arise as a result of Litigation (as hereinafter defined) or
Third-Party Claims (as hereinafter defined), assessed against, or paid, suffered
or incurred by, any Indemnified Party which directly or indirectly result from
or are based upon, or arise out of: (i) the execution, delivery and performance
of this Agreement; (ii) the Transfer, the Spin-Off, the solicitation of
directions from the Holders and all other transactions described herein or in
the Distribution Agreement in connection therewith (collectively, the
"Transactions"); (iii) the inaccuracy, untruth, or breach of any representation,
warranty, statement or opinion made by any of the Companies or their respective
officers, agents or counsel pursuant to this Agreement or the Indenture, or
contained in any certificate, opinion or other document or paper furnished to
the Trustee by any of the Companies or their respective officers, agents or
counsel in connection herewith or the Indenture; (iv) any breach or failure to
perform any covenant or agreement set forth in the Indenture by NSI in
connection with the Transactions; or (v) any action or failure to act on the
part of the Trustee or any other Indemnified Party in connection with this
Agreement or the Indenture with respect to the Transactions. Notwithstanding
anything else herein contained, the foregoing indemnity shall not be applicable
to any Losses suffered or incurred by any Indemnified Party as result of such
Indemnified Party's negligence or bad faith.

         For purposes of this Section, the terms "Litigation," "Losses,"
"Third-Party Claim" and "Indemnification Claim" shall have the following
meanings:

         "Litigation" shall mean any demand, action, suit, cause of action,
claim, complaint, prosecution, formal, informal, or threatened examination,
investigation, hearing or other proceeding (whether civil, criminal or
administrative or involving any arbitration) relating to or affecting an
Indemnified Party.

         "Losses" shall mean any and all assessments, losses, diminution in
value, damages, (including direct, indirect, special and consequential damages
and sums paid in settlement of claims), liabilities, judgments, costs and
expenses (including, without limitation, interest, penalties, fines, reasonable
costs of investigation defense, and the reasonable fees and expenses of
attorneys and other advisors).

                                       6

<PAGE>

         "Third-Party Claim" shall mean any Litigation (including, without
limitation, a binding arbitration or an audit by any governmental or
administrative authority) that is instituted or threatened against an
Indemnified Party and which, if prosecuted successfully, could result in an
Indemnification Claim.

         "Indemnification Claim" shall mean any claim for indemnification
provided under this Section 315.

         Section 316. Trustee's Fees and Expenses. Without duplication with
respect to any obligation of the Companies under Section 315 hereof, the
Companies jointly and severally agree to pay the Trustee upon the execution and
delivery of this Agreement and thereafter upon receipt of a written request
therefor, fees and expenses of the Trustee incurred in connection with this
Agreement and the Transactions, including, without limitation, all attorney's
fees and expenses in connection with (i) the review, negotiation and preparation
of this Agreement and any and all documents, opinions, certificates and other
papers prepared in connection herewith and with the Transactions, (ii) the
administration or enforcement of the Indenture or this Agreement in connection
with the Transactions, and (iii) any administrative, judicial, arbitration or
other proceedings, or any investigations with respect thereto or in any way
related to this Agreement or the Indenture with respect to any of the
Transactions.

                   REMAINDER OF PAGE INTENTIONALLY LEFT BLANK

                                       7

<PAGE>

                                   SIGNATURES

         IN WITNESS WHEREOF, the parties hereto have caused this First
Supplemental Indenture to be duly executed as of the date first written above.

                                   NATIONAL SERVICE INDUSTRIES, INC.

                                   By:  /s/ Brock A. Hattox
                                      ---------------------------------
                                      Brock A. Hattox
                                      Executive Vice President and CFO

                                   L & C SPINCO, INC.

                                   By:  /s/ James S. Balloun
                                      ---------------------------------
                                        James S. Balloun
                                        President and CEO

                                   L & C LIGHTING GROUP, INC.

                                   By:  /s/ James S. Balloun
                                      ---------------------------------
                                        James S. Balloun
                                        President and CEO

                                   THE ZEP GROUP, INC.

                                   By:  /s/ James S. Balloun
                                      ---------------------------------
                                        James S. Balloun
                                        President and CEO

                                   SUNTRUST BANK, as Trustee

                                   By:  /s/ Ronald C. Painter
                                      ---------------------------------
                                        Ronald C. Painter
                                        Group Vice President

                                       8

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