Orion Energy Systems Inc.: Announces fiscal 2010 third quarter results

CONTACT: Linda Diedrich

Orion Energy Systems

(920) 482-1988

Scott Jensen

Chief Financial Officer

Orion Energy Systems

(920) 892-5454

Company exceeds revenue and EPS guidance

MANITOWOC, Wis. — Feb. 2, 2010 — Orion Energy Systems Inc. (Nasdaq: OESX), a power technology enterprise that designs, manufactures and deploys energy management solutions for the commercial and industrial sectors, today announced financial results for its fiscal 2010 third quarter ended December 31, 2009.

For its third quarter of fiscal 2010, Orion reported revenues of $19.3 million and net income of $0.8 million, or $0.04 per share.

Total bookings for the quarter were $21.4 million, including $3.4 million in financing deals of which $1.7 million were Orion Virtual Power Plant™ (OVPP) supply agreements and $1.7 million were solar technology power purchase agreements. Orion defines bookings as customer purchase orders received during the quarter, including both purchase orders payable in cash and for OVPP supply deliveries over the life of the OVPP contracts and solar power purchase agreements.

Since December 2001, Orion’s technology has benefitted its customers and the environment by reducing its customers’:

* Energy demand by 504,324 kilowatts, or 10.1 billion kilowatt-hours;

* Energy costs by more than $782 million; and

* Indirect carbon dioxide emission by more than 6.75 million tons.

Orion’s energy management solutions have displaced 500 megawatts of capacity since 2001, which is equivalent to the amount of electricity produced by a traditional, fossil-fuel power plant. This milestone further validates the Company’s position as a leader in delivering permanent distributed load reduction.

Neal Verfuerth, Chairman and Chief Executive Officer of Orion Energy Systems commented, “We are pleased to report results for the third quarter that exceeded our revenue and earnings per share guidance, while also generating positive operating cash flow within the quarter. Revenues were driven in large part by increased order volume on the wholesale side of our business, where we continued to see sizable deals close as a result of our ongoing investments in this channel. We also experienced the addition of several new national accounts as commercial and industrial companies continue to view energy efficiency and sustainability as a key long-term priority.”

Mr. Verfuerth continued, “We have made great strides in expanding our product offering, which now includes electricity generation through our renewable offering, as well as permanent distributed load reduction from our integrated lighting solution. In addition, we have further enhanced our manufacturing capabilities and go-to market strategy, which we are now replicating across our wholesale channel to further broaden Orion’s geographical presence. As a result, Orion now has the people, assets, and strategies in place to truly capitalize on the opportunity both above and below the roof of our current and potential customers.”

Key Business Highlights

* Increased the number of facilities retrofitted with Orion’s Compact Modular high-intensity fluorescent technology to 5,374 in the third quarter, representing 850 million square feet.

* Total deployments of the InteLite® wireless controls increased to 244 customer locations, 22,374 transceivers and 319 control panels, representing 10.1 million square feet as of the end of the third quarter of fiscal 2010.

* Total Apollo® solar light pipes installed increased to 4,774 total installed units, representing 2.1 million square feet as of the end of the third quarter of fiscal 2010.

Fiscal 2010 Fourth Quarter Outlook

Fourth quarter fiscal 2010 revenues are anticipated to be between $18 million and $21 million. Earnings per share for the fourth quarter of fiscal 2010 are estimated to be between a loss of $(0.01) and earnings of $0.04 per diluted share.

Conference Call

Orion will host a conference call on Tuesday, Feb. 2, 2010 at 5:30 p.m. Eastern (4:30 p.m. Central/2:30 p.m. Pacific) to discuss details regarding its third quarter fiscal 2010 performance. Domestic callers may access the earnings conference call by dialing 800-289-0508 (International callers, dial 913-312-0672). Investors and other interested parties may also go to the Investor Relations section of Orion’s Web site at http://investor.oriones.com/events.cfm for a live webcast of the conference call. To ensure a timely connection, it is recommended that users register at least 15 minutes prior to the webcast.

About Orion Energy Systems

Orion Energy Systems Inc. (Nasdaq: OESX) is a leading power technology enterprise that designs, manufactures and deploys energy management systems, consisting primarily of high-performance, energy efficient lighting systems and controls and related services, for commercial and industrial customers without compromising their quantity or quality of light.