... ; working temperature is not more than 45°C2. Light personalization: with 8 grade dimmer, light is warm, steady without noise; light cover ... by energy saving (assume using the electricity 8 hours per day)LED light: 12W*8*365=35 degree; Energy-saving light: 40W ... *8*365=116.8 degree; Halogen light: 200W*8*365=584 degreeApplication: home,school, hospital, entertainment ...