The BTH halogen lamp from Osram is a 575W upgrade for 6” and 8” Fresnels, also suitable for PC spots using medium pre-focus base lamps. The lamp operates on 115V and is a direct replacement for the 500W, 120V BTL lamps, providing a brighter, whiter light with 30% more lumens and a higher color temperature. Additionally, the output of 15,500 lumens is rated higher than the output of most BTL lamps at 11,000 lumens. At an average rated life of 300 hours, the lamp has the same life as most ...

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