Orion Energy Systems: Proposed renewable energy legislation to be introduced TODAY at Orion Energy Systems

Bill seeks to boost state economy, create green collar jobs by amending renewable definition

MANITOWOC, Wis. — August 3, 2009 — State Reps. Ted Zigmunt and James Soletski, on Monday, Aug. 3, will speak at Orion Energy Systems Inc. (Nasdaq: OESX), introducing and seeking support for a new bill that will spur growth in Wisconsin’s green jobs sector and improve the environment.

The event will be held at 10:30 a.m. at Orion’s new technology center, 2210 Woodland Drive, Manitowoc. The media is invited and encouraged to attend the event.

The bill is co-authored in the Senate by Jeff Plale, D-South Milwaukee; Robert Cowles, R-Green Bay; and Joe Liebham, R-Sheboygan; and in the Assembly by Zigmunt, D-Francis Creek and Soletski, D-Green Bay. If passed, the bill will enable utilities to maximize their use of renewable energy and create green collar jobs throughout Wisconsin.

Orion’s innovation and technology recently won the praise of President Barack Obama, who applauded Orion in a White House speech promoting clean energy, the creation of green collar jobs and the importance of energy efficiency. Obama challenged Orion and other clean energy companies to “mount a historic effort to end once and for all our dependence on foreign oil.”

Orion has deployed its energy management systems in 4,581 facilities across North America. Since 2001, Orion technology has displaced more than 435 megawatts, saving customers more than $577 million and reducing indirect carbon dioxide emissions by 4.9 million tons. Orion’s technology was recently internationally recognized with a Platts Global Energy Award for the single most innovative and sustainable green technology of 2008.

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

Media Contact

Linda Diedrich

Director Corporate Communications

(920) 482-1988

ljd@oes1.com

Representative Ted Zigmunt

(888) 534-0002