AliTronics 27w Led Corn Bulb,Led Corn Light,3300 lumens,Repalce 100-150W Metal Halide Bulb,5 Year Warranty,5000k White color, Used in Post Top/Acorn/Highbay/ Lowbay Fixture 70-82% energy saving,replace 100-150W metal halide bulb or high pressure sodium bulb,very bright.So you can keep your current lighting fixture,save your purchase cost and electrical power. Bulb size:diameter 3.66* Length 8inch. Pls check this size carefully and ensure it can be installed into your fixture. Samsung led chip,3300 lumens,E26 medium base,5 years warranty,UL listed,360 degree beam angle and IP64 waterproof Can be used in enclosed fixture, pure 6063 Aluminum material - good heat dissipation. Installed in both indoor and outdoor lighting fixture,such as post top,high bay,acorn,parking lot,street light,garden,wall pack or garage.