Philips 20884-3 - 70 Watt - ED17 - MasterColor - Pulse Start - Metal Halide - Unprotected Arc Tube - 3000K - Medium Base - ANSI M143/M98/E - Universal Burn - MHC70/U/M/3K ALTO 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 ED17 bulb, 70W, Base: E26 Medium Screw, Rated Life (hours): 16000 hr, Color Temp: 3000K, Luminous Flux (LM):