SUGGESTED LED REPLACEMENTS: 

100 Watt EX39 Base Gen4 100-277V LED Retrofit Light Bulb

63/80/100 Watt HID Replacement EX39 Mogul Base LED Lamp

63/80/100W Power and Color Selectable HID Replacement Bulb EX39 3000/4000/5000K

100 Watt 100-277 Volt LED HID Corn Cob EX39 Base Retrofit Lamp

80/100/110 Watt Wattage and Color Selectable LED Post Top Retrofit with EX39 Mogul Base 120-277V 3000/4000/5000K

Upgrade your lighting system easily and affordably with White-Lux metal halide retrofit lamps from Venture. These unique lamps provide a crisp, 4K color that reduces glare and improves the overall work environment in your warehouse or building. Simply replace the existing lamp in your 250, 400, or 1000 watt HPS fixture - no need to change ballasts, ignitors, or reposition the socket. With this simple switch, you can improve efficiency, reduce errors, and increase productivity. Trust White-Lux for a brighter, better lighting solution.

Venture Lighting White-Lux MH 400W/U/LU (52134) Metal Halide retrofit light bulbs operates off of your existing LU400 S51 HPS ballast. With a Universal (U) burn position, and an E39 Mogul base, this HPS to MH retrofit ED37 bulb offers 41,000 lumens of 4000K cool white light. The 400 watt light is suitable for enclosed fixtures and has an impressive average rated life of 20,000 hours when used in the Vertical (V) position.