Philips 24515-9 - Stage and Studio - MSD - 250 Watt - 90 Volt - Metal Halide - 8500K 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, 250W, Base: GY9.5 2-Pin Prefocus, Rated Life (hours): , Color Temp: 8500K, LM