Litetronics International, Inc. offers an entire line of Rough Service™ incandescent lamps that have an average life of 20,000 hours.
That is up to 26 times longer than standard incandescent lamps. Rough Service lamps maintain higher light output throughout the life of the lamp, while other incandescent lamps have up to 20% light loss.
The triple alloy tungsten filament helps Rough Service lamps achieve longer life with superior color and lumens, and the lamps' unprecedented three getters neutralize any impurities that could potentially shorten lamp life. A special seven-support filament mounting allows Rough Service lamps to function well anywhere, even in areas with high vibration.