SYLVANIA 64320 - 250 Watt - BT28 - METALARC - Pulse Start - Metal Halide - Unprotected Arc Tube - 3800K - Mogul Base - ANSI M153/E - Universal Burn - MS250/PS/U Color/Finish: Clear Color Temperature: 3,800K Average Lifetime: 12000 hours Lumens (light output): 14000 CRI: 65