1,Square LED Downlight 2,Certificate:CE,ROHS, C-Tick, FCC 3, ... is from 5~100% and very stable.3) Outstanding Performance: High lumen output, Effiecent > 80% , PF > 0.9, Life Span > 50 ... : Working with PMW dimmers on market, not particularly for LED light.4) Input Voltage: 85-145V AC or 190-265V AC5 ... Semi LED15) Housing Color Option:Natural aluminum or painted white square recessed light