Venture 44810 - 150 Watt - Replaces 175 Watt - ED17 - PROBE START - Metal Halide - Unprotected Arc Tube - 4000K - Medium Base - ANSI M107/E or M57/E - Universal Burn - MH 150W/U/EM Color/Finish: Clear Color Temperature: 4,000K Average Lifetime: 10000 hours Lumens (light output): 13500