Bbier Inverted LED Post Top Retrofit No matter the size of your space fixture, we have the right bulb to light it up.These Retrofit Lights last longer than alternative bulbs, meaning you can also spend less money on replacement costs.LED Screw-In E39 E26 Lamp base ,Led Retrofits High Bay Bulbs with external driver are designed to replace HID bulbs and ballasts in your existing fixtures. Pancake head design available in 60 to 90 degree optic ranges to provide you the optimal light distribution for your large area.It is easy to install screw in Retrofit Led Lights for industrial indoor bay fixtures,it also can be used to replace HID and hps. Led Recessed Retrofit is simple and easy to install.