COOLWEST 250W Metal Halide MH Replacement, 50-watts Daylight LED Bulb,E27 4300 Lumens,Easy for Factory/Workshop Lights LED Retrofit Replace 250W Incandescent bulb by 50W LED, Cut your electricity bill by over 80% Standard E27 Base,Light Weight(Only 500g) Easy to Fit in your Lighting Fixtures(Warning: Make sure To Remove The Electronic Ballast, Capacitor,Ignitor In The Fixture Before Install The LED Bulb) Active Cooling Technology: Quiet and Efficient Oil-less Bearing Fan Max 4300 Lumens Output,90 Degree Light Beam Angle;Suggestion install height:4-5 meter Widely used in factory,workshop, warehouse, garage, garden,hotel, hospital, school etc.