... light:A: comparison by Luminous flux and applying efficiencyLED: 12W; Halogen light: 100W; Energy-saving light: 40WB: comparison by energy ... 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 venue, office, public place, etc. Ceiling Led Lamp