They are also designed for use in open or enclosed fixtures and feature lower UV output than standard metal halide lamps. A compact BT-28 outer jacket allows smaller fixture design.
Lamps are available in clear and coated versions.
Average rated lamp life is 20,000 hours. These lamps feature an infrared reflective coating on the tungsten halogen capsule, which refocuses waste heat back onto the filament, thus resulting in higher light output without increasing lamp wattage. At 29,000 CBCP, the 100W SP lamp is comparable to standard 150W halogen PAR lamps. These lamps are ideal in applications that demand the quality of halogen light with the additional benefits of energy savings over standard halogen sources with similar light output. Accepted items represent significant advancement to the art or science of lighting.