2U lamp 1, Base:E27 Nickel plated copper 2, Plastic:PBT 3, ... ;2, Using abt 80%-85% less energy than incandescent lamp;3, Releasing high density negative ions which is appropriate and good for ... system and refreshing the air.5, Compact size, convenient installation, high performance-to-price ratio.6, Flame retardant PBT material and ...