MANITOWOC, Wis., May 6, 2009 (GlobeNewswire via COMTEX News Network) -- Orion Energy Systems, Inc. (Nasdaq:OESX), a leading energy management company, announced today that it will hold its quarterly and year-end results conference call for investors and analysts on Thursday, May 14 at 5:30 p.m. Eastern (4:30 p.m. Central). The earnings announcement is scheduled for release at 5:00 p.m. Eastern. Orion's Chief Executive Officer, Neal Verfuerth, Chief Operating Officer, Erik Birkerts, and Chief Financial Officer, Scott Jensen, will host the conference call.

The details of the webcast and conference call are as follows:

Date: Thursday, May 14, 2009

Time: 5:30 p.m. Eastern

Access by conference call:

Domestic callers: Dial 877-723-9522

International callers: Dial 719-325-4754

Access by webcast:

Go to the Investor Relations section of Orion Energy Systems' Web site 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 May 21, 2009. The replay can be accessed by dialing 888-203-1112. International callers should dial 719-457-0820. The replay pass code for all callers is 6360047.

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.oesx.com.

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

This news release was distributed by GlobeNewswire, www.globenewswire.com

SOURCE: Orion Energy Systems, Inc.

Orion Energy Systems
          Erik G. Birkerts, Chief Operating Officer
          (920) 482-1924

          FD
          Victoria Paris
          (312) 553-6715

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