... a light source,to ensure its long life,energy efficient,environmentally friendly features 3,Optional light mode:smooth ... Size:L210*W210MMLight Efficiency:100-120lm/wCut-out Size:L190*W190MMLED Chip:Cree,Bridgelux,Edison, ... light is solid package,are cold-light source type.So it is very easy to transport ... low price mainly use defective chips made out from the bottom production lines,non-consistent ...