3*1w led down light 1,Cree, Epistar 2,90-120lm/w,1/3/5/7/9/12/15/18w 3,CE& ... Integrater LED driver(constant Current),no need extral ballast 3.Fully aluminum housing,excellent heat dissipation 4.Much ... lighting can be described as"once and for all"3,LED light can work at high speed.Energy- ... size,weight of transformer to make the initial determination.3,the brand and packaging about lamp beads: Quality ...