Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We have issued our report dated March 31, 2010, with respect to the consolidated financial statements (which report expressed an unqualified opinion and contains an explanatory paragraph relating to substantial doubt about Energy Focus, Inc.’s ability to continue as a going concern) in the Annual Report of Energy Focus, Inc. on Form 10-K for the year ended December 31, 2009. We consent to the use of the aforementioned reports in the Registration Statement and Prospectus, and to the use of our name as it appears under the caption “Experts.”

/s/ Plante & Moran, PLLC

Cleveland, Ohio
June 29, 2010