AliTronics 40w led Wall Pack Retrofit light,Led Shoebox light,Super bright 5800lumens,Replace 250W Metal Halide bulb,5 Years Warranty,used in Parking Lot/shoe Box Fixture/cobra Fixture 70-80% energy saving,replace 200-250W metal halide bulb or high pressure sodium bulb(called HPS bulb),very bright.So you can keep your current lighting fixture,save your purchase cost and electrical power. Bulb size:diameter 3.54* Length 10.5inch. Pls check this size carefully and ensure it can be installed into your fixture. 5800lumensE39 mogul base,5 years warranty,180 degree beam angle and IP64 waterproof Can be used in enclosed fixture, pure 6063 Aluminum material - good heat dissipation. Used for parking lot,shoebox,wall pack,canopy or street lighting