Amendment No.2 To Supplemental Executive Retirement Plan

Exhibit 10(iii)A(1)

AMENDMENT NO. 2

TO

ACUITY BRANDS, INC.

2002 SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN

(As Amended And Restated Effective As of January 1, 2005) THIS AMENDMENT made this 27 th day of September, 2007, by ACUITY BRANDS, INC. (the " Company" );

WITNESSETH :

WHEREAS, the Company established the Acuity Brands, Inc. 2002 Supplemental Executive Retirement Plan, which Plan was amended and restated generally effective as of January 1, 2005 (the " Plan" ); and

WHEREAS, the Company now desires to amend the Plan in the manner hereinafter provided;

NOW, THEREFORE, the Plan is hereby amended, as follows; 1.

Section 3.5 is hereby amended by deleting the present section in its entirety and substituting the following in lieu thereof.

" 3.5 Vested Terminee Benefit : A Participant who qualifies as a Vested Terminee (as ...