... air-purifying lamp 1, Life span: over 8000hours 2, Base: E27, nickel coated copper 3, Plastic part: PTC Led negative ion air-purifying ... 2, Using abt 80%-85% less energy than incandescent lamp;3, Releasing high density negative ions which is appropriate and ... preservation and antibacterial, boosting the immune system and refreshing the air.5, Compact size, convenient installation, high performance-to- ...