Orion Energy Systems Sets Conference Call and Webcast for First Quarter Fiscal 2009...

Orion Energy Systems Sets Conference Call and Webcast for First Quarter Fiscal
2009 Financial Results

MANITOWOC, Wis., July 22, 2008 (PRIME NEWSWIRE) -- Orion Energy Systems, Inc.
(Nasdaq:OESX), a leading energy management company announced today that it will
hold its quarterly results conference call for investors and analysts on
Tuesday, August 5 at 4:30 p.m. Central. Orion's Chief Executive Officer, Neal
Verfuerth, Chief Financial Officer, Scott Jensen and Chief Operating Officer,
Erik Birkerts will host the conference call. The details of the webcast and
conference call are as follows:

Date: Tuesday, August 5, 2008

Time: 4:30 p.m. Central

Access by conference call:
Domestic callers: Dial 877-419-6592
International callers: Dial 719-325-4864
Access by webcast:

Go to the Investor Relations section of Orion Energy Systems website at
http://investor.oriones.com/events.cfm for a live webcast link. To ensure a
timely connection, it is recommended that users register at least 15 minutes
prior to the scheduled webcast.

An audio replay of the earnings conference call will be available shortly after
the call and will remain available through Thursday, August 14, 2008. The replay
can be accessed by dialing 888-203-1112. International callers should dial
719-457-0820. The replay passcode for all callers is 2980145.

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.

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

-0-
CONTACT: Orion Energy Systems
Erik G. Birkerts
(920) 482-1924

FD Ashton Partners
Victoria Paris
(312) 553-6715