EXHIBIT 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED
PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Joseph G. Kaveski, the Chief Executive Officer of Energy Focus, Inc. (the “company”), certify for the purposes of section 1350 of chapter 63 of title 18 of the United States Code that, to the best of my knowledge,

(i) The Quarterly Report of the company on Form 10-Q for the period ended March 31, 2010 (the “Report”), fully complies with the requirements of Sections 13(a) or 15(d) of the Securities Exchange Act of 1934, and

(ii) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the company.

/s/ Joseph G. Kaveski  

Joseph G. Kaveski 

May 13, 2010 

A signed original of this written statement required by Section 906 has been provided to Energy Focus, Inc. and will be retained by Energy Focus, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.