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Clear ED37 metal halide bulb with mogul screw base

Philips

Philips MH400/U 400W Metal Halide Lamp Mogul Base

SKU CH-MTDV-GCMRJ

A 400W metal halide HID lamp delivering 39,000 lumens at 4,000K with a 20,000-hour rated life and universal burning position

  • TypeSpecialty Equipment Lamps
  • Delivers 39,000 lumens for high-output illumination
  • Universal burning position allows flexible fixture mounting
  • Rated 20,000 hours life reduces replacement frequency
  • 4,000 K colour temperature suits commercial environments
  • Mogul E39 base fits standard industrial sockets

Philips MH400/U Metal Halide Lamp

This 400 W metal halide HID bulb delivers 39 000 lm at 4 000 K with a CRI of 65. The ED37 clear envelope measures 4 5/8 in diameter and 11 1/2 in overall length. A mogul screw E39 base fits standard industrial fixtures. Universal burning position allows installation in any orientation.

Replaces 400 W probe-start metal halide lamps

The MH400/U upgrades older probe-start 400 W metal halide lamps with the same mogul base and universal burn rating. Rated life reaches 20 000 hr, reducing relamp cycles in high-bay and area lighting. The jump is worth it when existing fixtures accept the ED37 envelope and the 360-degree beam pattern matches the optical design.

Mogul base E39 and universal burning constraints

The E39 mogul base limits use to fixtures wired for that socket; it will not fit medium-base or recessed sockets. Universal burning permits any tilt, but the lamp requires a compatible HID ballast rated for 400 W metal halide operation. Minimum starting temperature is -40 °F, so cold-weather starts are supported without auxiliary gear.

Highlights

  • Delivers 39,000 lumens for high-output illumination
  • Universal burning position allows flexible fixture mounting
  • Rated 20,000 hours life reduces replacement frequency
  • 4,000 K colour temperature suits commercial environments
  • Mogul E39 base fits standard industrial sockets

Specifications

TypeSpecialty Equipment Lamps
BrandPhilips

Questions about this item

Will the 11 1/2 in overall length and 4 5/8 in diameter ED37 bulb fit my mogul-base fixture?

Yes, the lamp measures 11 1/2 inches long and 4 5/8 inches wide, matching standard E39 mogul-base sockets built for ED37 envelopes.

Does the universal burning position let me install it base-up, base-down or horizontal without extra steps?

The MH400/U is rated for universal operation, so you can mount it in any orientation; just ensure the mogul screw seats fully before switching on.

When should I plan to replace the bulb given its 20,000 hour rated life and 39,000 lumen output?

Expect about 20,000 hours of use before lumen maintenance drops off; schedule replacement around that interval to maintain target light levels.

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