HID Bulbs produce high output for their size making them a compact powerful & 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 T9 bulb, 315W, Base: PGZ18, Rated Life (hours): 30000, Color Temp: 3100K, Luminous Flux (LM): 38700 Philips 315 watts 100 volts T9 3100k PGZ18 base Clear MasterColor CDM-T Elite high intensity discharge Bulb