SUGGESTED ALTERNATES: 

M400/U/ED28 400 Watt M59/E Metal Halide Bulb

M400/U/ED37 400 Watt M59/E Metal Halide Bulb

MH400/U/ED28 400 Watt M59/E Metal Halide Bulb

MH 400W/U/ED28 400 Watt M59/E Metal Halide Bulb

MH400/ED37/U/4K 400 Watt M59/E Metal Halide Bulb

MH400/ED28/U/4K/E39 400 Watt M59/E Metal Halide Bulb

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

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

Metal Halide Cross Reference:
Sylvania M400/U/ED37
Satco MH400/ED37/U/4K
Venture MH 400W/U
Eiko MH400/U

Metal Halide bulbs are a member of the High Intensity Discharge (HID) family of lighting products. Metal Halide bulbs are among the most energy efficient sources of white light available today. These 400 watt metal halide bulbs feature special chemical compounds known as Halides that produce light in most regions of the spectrum.

Philips MH400/U (27449) Metal Halide light bulbs offer high efficacy, excellent color rendition, long service life and good lumen maintenance. Because of their numerous advantages, metal halide HID bulbs are used extensively in outdoor applications and in commercial interiors.

Philips 400W Metal Halide, Universal Burn Lamps are intended primarily for use in enclosed luminaires. Initial Lumens 39,000, Mean Lumens 23,350, rated average life 20,000 Hours when burned in the Vertical (V) position, ANSI Type M59/E. These Philips High Intensity Discharge Metal Halide HID light bulbs employ a Mogul Base and are designed with an ED37 bulb.

Specification Sheet