... : AC 220V 50HZ / AC 110V 50HZPower:3W-8WStructure:glassSize:95mm*95mm the lux decrease after ... super energy-saving can be installed easily. Specification: LED quantity: 12pcs, 15pcs, 18pcs, 20pcs, 21pcs ... the quality of products with reasonable price.LED driver(constant current) is our own advantage ... situation of LED lamp , it can ensure the good performance of LED bulb,such as high lumen maintainence, ...