Orion Energy Files for IPO

Orion Energy Systems Inc., a Plymouth, Wis.-based maker of energy-efficient lighting systems to large commercial and industrial customers, has filed for a $100 million IPO. It plans to trade on the Nasdaq under ticker symbol OESX, with Thomas Weisel Partners serving as lead underwriter. Orion Energy has raised VC funding from Expansion Capital Partners, Capvest Venture Fund and Custer Capital. www.oriones.com