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 * KACKLEY JAMES R   2. Issuer Name and Ticker or Trading Symbol ORION ENERGY SYSTEMS, INC. [OESX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President and COO (Last) (First) (Middle) 2210 WOODLAND DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 08/30/2010 (Street) MANITOWOC, WI 54220 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 08/30/2010   P   10,000 A $ 2.2854 (1) 197,976 D   Common Stock               45,000 I By Spouse as trustee

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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

Stock Options (right to buy)

$ 4.49

07/27/2008(2)

07/27/2017

Common Stock

10,000

10,000

D

Stock Options (right to buy)

$ 11.61

05/19/2009(3)

05/19/2018

Common Stock

14,851

14,851

D

Stock Options (right to buy)

$ 3.78

05/19/2010(4)

05/19/2019

Common Stock

10,583

10,583

D

Stock Options (right to buy)

$ 3.49

(5)

08/03/2019

Common Stock

35,000

35,000

D

Stock Options (right to buy)

$ 3.46

05/18/2011(6)

05/18/2020

Common Stock

19,912

19,912

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
KACKLEY JAMES R 2210 WOODLAND DRIVE MANITOWOC, WI 54220	X		President and COO

Signatures

/s/ Steven R. Barth, Attorney-in-Fact		08/31/2010
**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 price in Column 4 is a weighted average price. The prices actually received ranged from $2.279 to $2.30. The reporting person has provided to the issuer, and will provide to any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range for all transactions reported in this Form 4 utilizing an average weighted price.
(2)	Grant to reporting person of option to buy shares under the 2004 Stock and Incentive Awards Plan. This option, granted July 27, 2007, became fully exercisable on July 27, 2008.
(3)	Grant to reporting person of option to buy shares under the 2004 Stock and Incentive Awards Plan. This option, granted May 19, 2008, vests and becomes exercisable in three equal installments on May 19, 2009, 2010 and 2011, respectively.
(4)	Grant to reporting person of option to buy shares under the 2004 Stock and Incentive Awards Plan. This option, granted May 19, 2009, vests and becomes exercisable in three equal installments on May 19, 2010, 2011 and 2012, respectively.
(5)	Grant to reporting person of option to buy shares under the 2004 Stock and Incentive Awards Plan. This option, granted August 3, 2009, vests and becomes exercisable upon any termination of employment other than a termination for cause.
(6)	Grant to reporting person of option to buy shares under the 2004 Stock and Incentive Awards Plan. This option, granted May 18, 2010, vests and becomes exercisable in three equal installments on May 18, 2011, 2012 and 2013, respectively.

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