Orion Delivers Annual Revenue Growth of 67 Percent and Earnings per Diluted Share of $0.19

CEO Neal Verfuerth to Ring NASDAQ Opening Bell On Tuesday, April 22

Orion Expected to Post Annual Revenue Growth of 67 Percent for Fiscal 2008, Exceeding the Company's Previous Estimates of 62 Percent Annual Revenue Growth

Rating Enables Orion to Target Energy Efficiency Projects in Wet Production Environments

Efficiency Gains From Orion's Lighting Technology Positions SYSCO for Annual Savings Approaching $3 Million

MANITOWOC, Wis., Apr 11, 2008 (PrimeNewswire via COMTEX News Network) -- Orion Energy Systems, Inc. (Nasdaq:OESX) today announced that it has retained the law firm Skadden, Arps, Slate, Meagher & Flom LLP as defense counsel in purported securities class action lawsuits filed in the United States

Project Demonstrates Power of Orion's Wireless InteLite Control Platform to Intelligently Manage Light Usage

Second Annual Earth Day Conference to Feature Plenary Speakers

Orion Joins Leading International Experts At High Profile Environmental Finance Event

MANITOWOC, Wis., Mar 20, 2008 (PrimeNewswire via COMTEX News Network) -- Orion Energy Systems Inc. (Nasdaq:OESX) is pleased to announce that as of March 24, 2008 the company will be added to the NASDAQ(r) Clean Edge(r) U.S. Index (Nasdaq:CLEN) and the NASDAQ(r) Clean Edge(r) U.S.