1) environmentally friendiy, no noise, high efficienty; 2) low energy consumption, low heat, ultra-energy saving; 3)safe, no harmful substance, light transmittance is 90% 4) life span: 50000hrs 5) specifications: Holder: E27/B22/MR16/GU10 Material: aluminum Size: 50mm(dia)x70mm(height) Power: 1X1W/3W Voltage: AC120V or 230V Luminous flux: 360-450 Color: Daylight, warm light Application: school, factory, hotel, store, airport, railway, home decoration