OSRAM SYLVANIA HBO 103 W/2 100W SFA7.5-2,SFA9-2 CLEAR Mercury-Arc-Lamps 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 OSRAM bulb, 103W, Base: SFa7.5-2, Rated Life (hours): 300, Luminous Flux (lm): 2550