Serving as a replacement for medium-base incandescent and compact fluorescent lamps, Dura-One uses advanced magnetic induction technology, eliminating the need for coils that eventually wear out. With a rated life of 15,000 hours, high light output is delivered over a wide temperature range-90 percent of its rated light output is from 25 to 150 degrees Fahrenheit. Additional benefits include flicker-free, instant-on starting.