1*1w led down light 1,Cree, Epistar 2,90-120lm/w,1/3/5/7/9/12/15/18w 3,CE&RoHS, 4.2 ... work long hours under high temperature,the light fades quickly,life is very short,ceiling light with too bad brightness can not achieve ... beads: Quality of lamp bead decides the lighting effect of LED ceiling light;the technology of packaging affects quality,cooling and other key ...