Sylvania 68843 - H44GS-100SP Mercury Vapor Black Light 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 Sylvania PAR38 bulb, 100W, Spot SP Base: E27 Medium Skirt, Rated Life (hours): 16000, Color Temp: 5900K, Luminous Flux (LM): 2500