Ushio GLC/HP600 115 Volt, 600 Watt halogen bulb. This bulb is compatible c some AltMan (360Q, OutDoor 600, Star PAR) & Philips (Selecon Acclaim Axial, Selecon Pacific 600W, Strand Lighting SI 5/10/19/26/36/52, SI 15/38 & SI 23/50), as well as CCT Lighting Freedom Fresnel, ControLite WashLite HX-TV & Sagitter ProFile.

The chances that this bulb works are slim. It has been bandied about over the years, and even the top nipple has been knocked off. Thus the price. I lose money on this in hopes it somehow works and that it finds a good home, you take a chance of losing 1U.S.D. and get a smoking deal if it happens to work.