FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * PARHAM JOSEPH G JR   2. Issuer Name and Ticker or Trading Symbol ACUITY BRANDS INC [AYI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) SVP, Human Resources (Last) (First) (Middle) 1170 PEACHTREE STREET, NE, SUITE 2400 3. Date of Earliest Transaction (Month/Day/Year) 08/11/2005 (Street) ATLANTA, GA 30309 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 08/11/2005   M   3,077 A $ 13.8 43,281 D   Common Stock 08/11/2005   S   3,077 D $ 28.99 40,204 (1) D   Common Stock               319 I by 401(k)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Underlying Securities (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option	$ 13.8	08/11/2005		M			15,800	(2)	12/02/2011	Common Stock	15,800	$ 0	67,777	D
Employee Stock Option	$ 13.8	08/11/2005		M			1,100	(2)	12/02/2011	Common Stock	1,100	$ 0	66,677	D
Employee Stock Option	$ 13.8	08/11/2005		M			2,300	(2)	12/02/2011	Common Stock	2,300	$ 0	64,377	D
Employee Stock Option	$ 13.8	08/11/2005		M			3,200	(2)	12/02/2011	Common Stock	3,200	$ 0	61,177	D
Employee Stock Option	$ 13.8	08/11/2005		M			1,200	(2)	12/02/2011	Common Stock	1,200	$ 0	59,977	D
Employee Stock Option	$ 13.8	08/11/2005		M			1,500	(2)	12/02/2011	Common Stock	1,500	$ 0	58,477	D
Employee Stock Option	$ 13.8	08/11/2005		M			500	(2)	12/02/2011	Common Stock	500	$ 0	57,977	D
Employee Stock Option	$ 13.8	08/11/2005		M			4,900	(2)	12/02/2011	Common Stock	4,900	$ 0	53,077	D
Employee Stock Option	$ 13.8	08/11/2005		M			100	(2)	12/02/2011	Common Stock	100	$ 0	52,977	D
Employee Stock Option	$ 13.8	08/11/2005		M			300	(2)	12/02/2011	Common Stock	300	$ 0	52,677	D
Employee Stock Option	$ 13.8	08/11/2005		M			2,000	(2)	12/02/2011	Common Stock	2,000	$ 0	50,677	D
Employee Stock Option	$ 13.8	08/11/2005		M			100	(2)	12/02/2011	Common Stock	100	$ 0	50,577	D
Employee Stock Option	$ 13.8	08/11/2005		M			100	(2)	12/02/2011	Common Stock	100	$ 0	50,477	D
Employee Stock Option	$ 13.8	08/11/2005		M			1,900	(2)	12/02/2011	Common Stock	1,900	$ 0	48,577	D
Employee Stock Option	$ 13.8	08/11/2005		M			500	(2)	12/02/2011	Common Stock	500	$ 0	48,077	D
Employee Stock Option	$ 13.8	08/11/2005		M			3,077	(2)	12/02/2011	Common Stock	3,077	$ 0	45,000	D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
PARHAM JOSEPH G JR 1170 PEACHTREE STREET, NE SUITE 2400 ATLANTA, GA 30309			SVP, Human Resources

Signatures

Joseph G. Parham		08/14/2005
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The total direct shares owned following the reported transaction includes 25,668 time-vesting restricted shares and 1,188 shares held in a Section 423 stock purchase plan.
(2)	This option vested in equal annual installments over a three year period and became fully vested on December 3, 2004.
Remarks: This Form 4 filing is being transmitted in two parts due to limitation of the number of transactions that can reported via the EDGAR system.  Please include informaton from both Forms filed with this effective date for complete transaction information.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

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