Photo Release -- Underwriters Laboratories Issues Wet Location Rating for Orion Energy...

Photo Release -- Underwriters Laboratories Issues Wet Location Rating for Orion
Energy Systems' EG Series Lighting Fixtures

MANITOWOC, Wis., April 17, 2008 (PRIME NEWSWIRE) -- Orion Energy Systems, Inc.
(Nasdaq:OESX) has obtained the Wet Location rating from Underwriters
Laboratories Inc. (UL) for its EG Series Enclosed and Gasketed High-Intensity
Fluorescent (HIF) lighting fixtures. The Wet Location rated EG Series joins
Orion's Damp Location rated EG Series fixtures and is available in 4-, 6-, and
8-lamp designs. With the Wet Location rating, Orion's EG series meets NEC Code
Article #410-4 which requires all fixtures installed in wet locations to obtain
the "Suitable for Wet Location" rating.

A photo accompanying this release is available at
http://www.primenewswire.com/newsroom/prs/?pkgid=4934

Orion developed the Wet Location EG Series in response to strong demand
witnessed in the brewing, beverage and food service industries. "We believe the
EG Series is the best performing HIF fixture to carry the Wet Location rating,"
said Neal Verfuerth, President and CEO of Orion. "Its application extends beyond
the brewing industry as its design can bring the cost advantages of HIF into any
enterprise where water spray is an issue that must be managed."

The EG units' Wet Location rating means the fixtures have been tested to meet or
exceed standards for operation in a rain-like atmosphere. To obtain the listing,
fully powered EG units underwent over 4 1/2 hours of testing, including 3 1/2
hours of simulated rain created by 1/8" nozzles spraying water at 5 psi
pressure. Upon completion of the test, the units had no leaks and no shorts as
shown by Hipot (dielectric) testing at 1960 volts.

UL is an independent product safety certification organization that has been
testing products and writing Standards for Safety for over a century. Based in
Northbrook, Illinois, UL develops standards and test procedures for products,
materials, components, assemblies, tools and equipment, chiefly dealing with
product safety. UL also evaluates and certifies the efficiency of a company's
business processes through its management system registration programs.

Orion has deployed its energy management systems in 3,300 facilities across
North America. Since 2001, Orion technology has displaced over 303 megawatts,
enough electricity to power more than 250,000 homes per year, saving customers
$304 million, and reducing indirect CO2 emissions by 3.8 million tons.

About Orion Energy Systems, Inc.

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 and
controls and related services, for commercial and industrial customers without
compromising their quantity or quality of light. For more information, visit
www.oriones.com.

The Orion Energy Systems, Inc. logo is available at
http://www.primenewswire.com/newsroom/prs/?pkgid=4540

The photo is also available at Newscom, www.newscom.com, and via AP
PhotoExpress.

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CONTACT: Orion Energy Systems, Inc.
Media Contact:
Linda Diedrich, Director Corporate Communications
920-482-1988
ljd@oes1.com