The Sylvania / Osram FLK Lamp is a 575W, 115V halogen T5 bulb designed for studio, theater, television, and video applications. It features a G9.5
Osram 4 HPL575 575W 115V HPL 575 bulb lamp Studio - Halogen Bulbs
Candela Corporation
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Osram Sylvania FLK/X 575W, 115V Halogen Lamp
Osram GLC 575w/115V, G9.5 Studio Lamp - Monkey Wrench Productions Store
FLK 115V 575W Light Bulb, Replacement Lamp
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OSRAM FLK/X Long Life 575w 115v G9.5 Single Ended Halogen Bulb
OSRAM FLK, OS FLK 115V #54589, Halogen
Ushio FLK, HX-600, JCV575w 115v Halogen Bulb – BulbAmerica