Philips 24500-1 - MSR-400 SA - 400 Watt - Stage and Studio - 5600K HID Bulbs produce high output for their size making them a compact powerful &amp; efficient light source HID Bulbs are used for general lighting, professional lighting fixtures, growing applications HID bulbs put out around 3-5 times greater output (lumens per watt) than traditional halogen bulbs Philips bulb, 400W, Base: GY9.5 2-Pin Prefocus, Rated Life (hours): , Color Temp: 5600K, LM