SUPPLEMENTAL INDENTURE

     SUPPLEMENTAL INDENTURE (this "Supplemental Indenture"), dated as of May 20,
2004, among Alfa Lighting, Inc. and Modulight LLC (each a "Guaranteeing
Subsidiary"), each a subsidiary of Juno Lighting, Inc. (or its permitted
successor), a Delaware corporation (the "Company"), the Company, the other
Guarantors (as defined in the Indenture referred to herein) and U.S. Bank
National Association (formerly known as Firstar Bank of Minnesota, N.A.), 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 June 30, 1999 providing for the
issuance of an aggregate principal amount of up to $125,000,000 of 11 7/8%
Senior Subordinated Notes due 2009 (the "Notes");

     WHEREAS, the Indenture provides that under certain circumstances each
Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental
indenture pursuant to which each Guaranteeing Subsidiary shall unconditionally
guarantee all of the Company's Obligations under the Notes and the Indenture on
the terms and conditions set forth herein (the "Note Guarantee"); and

     WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is
authorized to execute and deliver this Supplemental Indenture.

     NOW THEREFORE, in consideration of the foregoing and for other good and
valuable consideration, the receipt of which is hereby acknowledged, each
Guaranteeing Subsidiary, on the one hand, and the Trustee, on the other hand,
mutually covenant and agree for the equal and ratable benefit of the Holders of
the Notes as follows:

1.     CAPITALIZED TERMS. Capitalized terms used herein without definition shall
have the meanings assigned to them in the Indenture.

2.     AGREEMENT TO GUARANTEE. Each Guaranteeing Subsidiary hereby agrees as
follows:

     (a)     Along with all Guarantors named in the Indenture, to jointly and
severally Guarantee to each Holder of a Note authenticated and delivered by the
Trustee and to the Trustee and its successors and assigns, the Notes or the
obligations of the Company hereunder or thereunder, that:

          (i)     the principal of and interest on the Notes will be promptly
paid in full when due, whether at maturity, by acceleration, redemption or
otherwise, and interest on the overdue principal of and interest on the Notes,
if any, if lawful, and all other obligations

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of the Company to the Holders or the Trustee hereunder or thereunder will be
promptly paid in full or performed, all in accordance with the terms hereof and
thereof; and

          (ii)     in case of any extension of time of payment or renewal of any
Notes or any of such other obligations, that same will be promptly paid in full
when due or performed in accordance with the terms of the extension or renewal,
whether at stated maturity, by acceleration or otherwise. Failing payment when
due of any amount so guaranteed or any performance so guaranteed for whatever
reason, the Guarantors shall be jointly and severally obligated to pay the same
immediately.

     (b)     The obligations hereunder shall be unconditional, irrespective of
the validity, regularity or enforceability of the Notes or the Indenture, the
absence of any action to enforce the same, any waiver or consent by any Holder
of the Notes with respect to any provisions hereof or thereof, the recovery of
any judgment against the Company, any action to enforce the same or any other
circumstance which might otherwise constitute a legal or equitable discharge or
defense of a guarantor.

     (c)     The following is hereby waived: diligence presentment, demand of
payment, filing of claims with a court in the event of insolvency or bankruptcy
of the Company, any right to require a proceeding first against the Company,
protest, notice and all demands whatsoever.

     (d)     This Note Guarantee shall not be discharged except by complete
performance of the obligations contained in the Notes and the Indenture, and
each Guaranteeing Subsidiary accepts all obligations of a Guarantor under the
Indenture.

     (e)     If any Holder or the Trustee is required by any court or otherwise
to return to the Company, the Guarantors, or any Custodian, Trustee, liquidator
or other similar official acting in relation to either the Company or the
Guarantors, any amount paid by either to the Trustee or such Holder, this Note
Guarantee, to the extent theretofore discharged, shall be reinstated in full
force and effect.

     (f)     Neither Guaranteeing Subsidiary shall be entitled to any right of
subrogation in relation to the Holders in respect of any obligations guaranteed
hereby until payment in full of all obligations guaranteed hereby.

     (g)     As between the Guarantors, on the one hand, and the Holders and the
Trustee, on the other hand, (x) the maturity of the obligations guaranteed
hereby may be accelerated as provided in Article 6 of the Indenture for the
purposes of this Note Guarantee, notwithstanding any stay, injunction or other
prohibition preventing such acceleration in respect of the obligations
guaranteed hereby, and (y) in the event of any declaration of acceleration of
such obligations as provided in Article 6 of the Indenture, such obligations
(whether or not due and payable) shall forthwith become due and payable by the
Guarantors for the purpose of this Note Guarantee.

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     (h)     The Guarantors shall have the right to seek contribution from any
non-paying Guarantor so long as the exercise of such right does not impair the
rights of the Holders under the Guarantee.

          (i)     Pursuant to Section 10.02 of the Indenture, after giving
effect to any maximum amount and any other contingent and fixed liabilities that
are relevant under any applicable Bankruptcy or fraudulent conveyance laws, and
after giving effect to any collections from, rights to receive contribution from
or payments made by or on behalf of any other Guarantor in respect of the
obligations of such other Guarantor under Article 10 of the Indenture, this new
Note Guarantee shall be limited to the maximum amount permissible such that the
obligations of such Guarantor under this Note Guarantee will not constitute a
fraudulent transfer or conveyance.

3.     EXECUTION AND DELIVERY. Each Guaranteeing Subsidiary agrees that the Note
Guarantees shall remain in full force and effect notwithstanding any failure to
endorse on each Note a notation of such Note Guarantee.

4.     GUARANTEEING SUBSIDIARY MAY CONSOLIDATE, ETC. ON CERTAIN TERMS.

     (a)     Neither Guaranteeing Subsidiary may consolidate with or merge with
or into (whether or not such Guarantor is the surviving Person) another
corporation, Person or entity whether or not affiliated with such Guarantor
unless:

          (i)     subject to Sections 10.04 and 10.05 of the Indenture, the
Person formed by or surviving any such consolidation or merger (if other than a
Guarantor or the Company) unconditionally assumes all the obligations of such
Guarantor, pursuant to a supplemental indenture in form and substance reasonably
satisfactory to the Trustee, under the Notes, the Indenture and the Note
Guarantee on the terms set forth herein or therein; and

          (ii)     immediately after giving effect to such transaction, no
Default or Event of Default exists.

     (b)     In case of any such consolidation, merger, sale or conveyance and
upon the assumption by the successor corporation, by supplemental indenture,
executed and delivered to the Trustee and satisfactory in form to the Trustee,
of the Note Guarantee endorsed upon the Notes and the due and punctual
performance of all of the covenants and conditions of the Indenture to be
performed by the Guarantor, such successor corporation shall succeed to and be
substituted for the Guarantor with the same effect as if it had been named
herein as a Guarantor. Such successor corporation thereupon may cause to be
signed any or all of the Note Guarantees to be endorsed upon all of the Notes
issuable hereunder which theretofore shall not have been signed by the Company
and delivered to the Trustee. All the Note Guarantees so issued shall in all
respects have the same legal rank and benefit under the Indenture as the Note
Guarantees theretofore and thereafter issued in accordance with the terms of the
Indenture as though all of such Note Guarantees had been issued at the date of
the execution hereof.

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     (c)     Except as set forth in Articles 4 and 5 and Section 10.05 of
Article 10 of the Indenture, and notwithstanding clauses (a) and (b) above,
nothing contained in the Indenture or in any of the Notes shall prevent any
consolidation or merger of a Guarantor with or into the Company or another
Guarantor, or shall prevent any sale or conveyance of the property of a
Guarantor as an entirety or substantially as an entirety to the Company or
another Guarantor.

5.     RELEASES.

     (a)     In the event of a sale or other disposition of all of the assets of
any Guarantor, by way of merger, consolidation or otherwise, or a sale or other
disposition of all to the capital stock of any Guarantor, in each case to a
Person that is not (either before or after giving effect to such transaction) a
Restricted Subsidiary of the Company, then such Guarantor (in the event of a
sale or other disposition, by way of merger, consolidation or otherwise, of all
of the capital stock of such Guarantor) or the corporation acquiring the
property (in the event of a sale or other disposition of all or substantially
all of the assets of such Guarantor) will be released and relieved of any
obligations under its Note Guarantee; provided that the Net Proceeds of such
sale or other disposition are applied in accordance with the applicable
provisions of the Indenture, including without limitation Section 4.10 of the
Indenture. Upon delivery by the Company to the Trustee of an Officers'
Certificate and an Opinion of Counsel to the effect that such sale or other
disposition was made by the Company in accordance with the provisions of the
Indenture, including without limitation Section 4.10 of the Indenture, the
Trustee shall execute any documents reasonably required in order to evidence the
release of any Guarantor from its obligations under its Note Guarantee.

     (b)     Any Guarantor not released from its obligations under its Note
Guarantee shall remain liable for the full amount of principal of and interest
on the Notes and for the other obligations of any Guarantor under the Indenture
as provided in Article 10 of the Indenture.

6.     NO RECOURSE AGAINST OTHERS. No past, present or future director, officer,
employee, incorporator, stockholder or agent of either Guaranteeing Subsidiary,
as such, shall have any liability for any obligations of the Company or any
Guaranteeing Subsidiary under the Notes, any Note Guarantees, the Indenture or
this Supplemental Indenture or for any claim based on, in respect of, or by
reason of, such obligations or their creation. Each Holder of the Notes by
accepting a Note waives and releases all such liability. The waiver and release
are part of the consideration for issuance of the Notes. Such waiver may not be
effective to waive liabilities under the federal securities laws and it is the
view of the SEC that such a waiver is against public policy.

7.     NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL
GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE BUT WITHOUT GIVING
EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE
APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

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8.     COUNTERPARTS. The parties may sign any number of copies of this
Supplemental Indenture. Each signed copy shall be an original, but all of them
together represent the same agreement.

9.     EFFECT OF HEADINGS. The Section headings herein are for convenience only
and shall not affect the construction hereof.

10.     THE TRUSTEE. The Trustee shall not be responsible in any manner
whatsoever for or in respect of the validity or sufficiency of this Supplemental
Indenture or for or in respect of the recitals contained herein, all of which
recitals are made solely by each Guaranteeing Subsidiary, with respect to itself
only, and the Company.

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

 

ALFA LIGHTING, INC., a California corporation

By:                               

Name:

Title:

 

MODULIGHT LLC, a Delaware limited liability company

By:                               

Name:

Title:

 

JUNO LIGHTING, INC., a Delaware corporation

By:                               

Name:

Title:

 

JUNO MANUFACTURING, INC., an Illinois

corporation

By:                               

Name:

Title:

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INDY LIGHTING, INC., an Indiana corporation

By:                               

Name:

Title:

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U.S. BANK NATIONAL ASSOCIATION (formerly, FIRSTAR BANK OF MINNESOTA, N.A.), as
Trustee

By:                          

Name:

Title:     Authorized Signatory

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