Philips 146506 - CDM400S51/HOR/4K/ALTO 400 watt Metal Halide Light Bulb
400 watt - 94 volt - ED18 - Mogul Screw (E39) Base - 4,000K - Clear - 800 Series - Horizontal Burn - +/- 15 Degrees - ALTO - HPS-Retro White - MasterColor - Ceramic | Philips Metal Halide HID Light Bulb