SUGGESTED LED REPLACEMENTS: 

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

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

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

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

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

110 Watt EX39 Mogul Base HID Shoebox Wall Pack Retrofit CCT Selectable 30/40/50K

110 Watt 120-277V 180 Degree Beam Shoe Box LED HID Retrofit with Smart Port

Sylvania M400/PS/U/ED37 (the factory replacement for the M400/PS/U - 64321) Pulse Start Metal Halide lamps are members of the high intensity discharge family which is the most efficient source of white light today. Metal Halide Pulse Start lamps provide superior performance compared to standard metal halide lamps. The specific benefits are higher Efficacy, better color uniformity, faster warm-up, improved Lumen Maintenance and longer life. More light for less energy make Pulse Start Metal Halide the most logical lighting choice for designers and corporate energy managers seeking to reduce power bills.

Attention: Due to the physical size and fragility of this lamp, we are able to ship this product via Federal Express Ground or Air only. Sorry, no U.S. Postal Service shipments will be accepted. Thank you for your understanding.

The Sylvania Metalarc Pulse Start M400/PS/U/ED37 (64054) 400 watt Metal Halide bulb is a universal burn lamp and operates in any position within your fixture. The M400/PS/U/ED37 is the factory replacement for the M400/PS/U (64321). These Pulse Start Metal Halide lamps are intended for use in enclosed luminaires.

When operated in the Vertical (Base Up) position the Initial Lumens are 36,000 and the Mean Lumen output is 25,500. The rated average life is 20,000 hours and the lamp is ANSI Type M155/E. This Sylvania 400w Pulse Start Lamp employs an E39 Mogul Base and is designed with a ED37 bulb.

Specification Sheet