Features: 1) Removing the smock and dust 2) Killing the bacteria and sterilizing 3) Removing the peculiar smells 4) Energy saving and lighting 5) Purifying the air 6) Promoting the health 7) Environmentally friendly Specifications: 1) Wattage: 11, 15, 20, 23W 2) Lamp cap: E26, E27, B22 3) Color temp.: 2,700 / 6,000K 4) Voltage: 100 - 130V / 220 - 240V 5) Lifespan: 5,000 / 8,000 / 10,000hrs 6) Tube diameter: 12mm 7) Plastic diameter: 56mm Outer packing: Standard export carton Carton dimensions: 31.7 x 31.7 x 35.5cm