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Clear ED28 metal halide bulb with E39 mogul screw base

Ushio

Ushio 400W UMH-400/U ED28 metal halide standard bulb

SKU CH-QSYA-YYAY4

A 400-watt metal halide bulb producing 34000 lumens at 4000K with a 20000-hour life and an E39 mogul screw base

  • TypeHigh Intensity Discharge
  • Lumen Range34000
  • Wattage400
  • Color Temperature4000K
  • Life Time Hours20000
  • Delivers 34000 lumens for bright commercial illumination
  • 4000 K colour temperature provides clean white light
  • 20000-hour rated life reduces replacement frequency
  • Operates in any burning position for flexible mounting
  • E39 mogul screw base fits standard industrial fixtures

Commercial lighting fit

The Ushio 400W UMH-400/U is a metal halide lamp with an E39 mogul screw base and an ED28 bulb shape. It delivers 34000 lumens at 4000K with a 65 to 75 CRI and a rated life of 20000 hours. Suitable for commercial and industrial flood lighting, stadiums, parking garages and security installations.

Buyers needing different bases or wattages

This lamp requires a fixture that accepts an E39 mogul base and is ballasted for 400 watts. It will not work in sockets sized for smaller bases or in circuits rated for other wattages. Buyers who need a different base type, a lower lumen output or a different colour temperature should select another lamp.

E39 mogul base requirement

The single specification that decides compatibility is the E39 mogul screw base combined with the 400-watt rating. The fixture must match both exactly for the lamp to operate.

Highlights

  • Delivers 34000 lumens for bright commercial illumination
  • 4000 K colour temperature provides clean white light
  • 20000-hour rated life reduces replacement frequency
  • Operates in any burning position for flexible mounting
  • E39 mogul screw base fits standard industrial fixtures

Specifications

BrandUshio
TypeHigh Intensity Discharge
Lumen Range34000
Wattage400
Color Temperature4000K
Life Time Hours20000

Questions about this item

How do I install this ED28 metal halide bulb and what step is commonly missed?

Screw the E39 mogul base into a compatible fixture rated for 400 W metal halide and the correct ANSI ballast; the step often missed is verifying the ballast matches the lamp code before powering on.

What maintenance or replacement will this 400 W metal halide bulb need over its life?

Plan to replace the lamp after roughly 20000 hours when output drops below useful levels; no other user-serviceable parts exist inside the sealed ED28 envelope.

What limit appears first when this 34000 lumen bulb runs continuously?

The 20000 hour rated life is the first hard limit; lumen maintenance and colour shift accelerate beyond that point even though the lamp operates in any burning position.

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