Led negative ion air-purifying lamp 1, Life span: over 8000hours 2, Base: E27, nickel ... coated copper 3, Plastic part: PTC Led negative ion air-purifying lamp1, Flicker free instant start, long life average 10000 hours ... smoke, Promoting health, food preservation and antibacterial, boosting the immune system and refreshing the air.5, Compact size, convenient installation, high ...