Osram BTH 575W 115V Lamp

The Osram BTH is the newest lamp option for your 6 inch Fresnels. The Compact biplane filament provides color temperature similar to HPL and GLA lamps. The 575 Watt draw allows you to add these lamps to your designs using the same math you use for your Source Four®'s and SL's. At 15,500 lumens, you'll see a 4,000 lumen improvement by replacing your BTL stock with BTH as a result of the improved filament design.