... Description LED High Bay LightPower:20-100Wspanlife:50000Hrs,if it work 12 Hrs per day,it can work over ... 10 years.PF:>0.95AC110V-240V,50-60Hz,DC24/36V60-82lm/wThe high bay ... light is controlled by constant current and constant voltage,noise pullution and unstable light caused by ballast.It ... working with direct current and lower voltage.It is power saving and environment friendly.The ...