These UFO LED high bay lights are powerful illumination solution for lighting up large spaces from 13-50ft high ceilings, with typical application in warehouses, factories, workshops, gyms, gas stations, supermarkets, exhibition halls, parking garages, airports, subways, shopping malls and other large spaces. With up to 180Lm/W high light efficacy, the energy-saving LED high bays give high brightness at low power consumptions. Housed by ADC12 diecast aluminum, these UFO LED high bay fixtures have excellent thermal heat dissipation with rugged construction. By using branded LED chips and drivers, these LED fixtures have at least 50,000 hours rated lifetimes. All these outstanding features make it ideal replacement of traditional fluorescent and metal halide fixtures, e.g. one 200W UFO LED high bay light is far enough to replace 400W Metal Halide Lamp (MH). Intelligent control is available with these light fixtures and the brightness is dimmable by DALI/0-10V/PWM dimming solutions. With external motion sensor, the UFO high bays can be auto on or auto off according to the motion detected. These fixtures can fit into the ceiling through hanging hooks, hanging rods or brackets.