... or RF interference 2,Good heat sink system,no flash,super bright 3,Factory price,good service Place of Origin: ... /50-60HzLight source: EPI star or CreeLumen maintenance: 3000hrs < 3%Power Factor > 0.5Color temperature (K): 2700K, 5000K, ... 90% than conventional incandescent bulbs11, No strobing during working, fast response (no delay)12, Specific high effective constant current technology13, Warranty, ...