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Clear T6 halogen bulb with G9.5 two-pin base and ceramic heat sink

Ushio

Ushio 1003183 HPL 375W 240V 1000-Hour standard bulb

SKU CH-WM4M-41RDG MPN 1003183

A 375-watt halogen studio lamp with a G9.5 base and 1,000-hour rated life for ETC Source Four fixtures

  • TypeHalogen Bulbs
  • Wattage375
  • 375 W halogen output delivers 7250 lumens for bright studio illumination
  • 240 V G9.5 base with ceramic heat sink ensures stable electrical performance
  • 1000-hour rated life reduces relamping frequency in continuous use
  • 100 CRI at 7250 K provides accurate colour rendering for production work
  • Redesigned ultra-compact filament yields up to 20% more fixture lumens in ETC Source Four

375W 240V halogen studio lamp

The Ushio 1003183 HPL-375/240X is a tungsten-halogen lamp rated at 375W and 240V for professional studio fixtures. It delivers 7250 lumens at a 7250K colour temperature with a CRI of 100 for accurate colour rendering. The compact T6 filament geometry improves optical efficiency in compatible ellipsoidal reflector spotlights. Buyers needing a different voltage or wattage should select an alternative model.

G9.5 base with ceramic heat sink

The lamp uses a G9.5 two-pin base with an integrated ceramic heat sink that maintains consistent electrical resistance throughout its 1000-hour rated life. Fixtures must supply 240V and accept the T6 envelope dimensions of 0.72in diameter and 4.09in maximum overall length. The 6-C8 filament design requires precise optical alignment within the luminaire for optimal output. Installations lacking a G9.5 socket or operating at another voltage cannot use this lamp.

Direct replacement for ETC Source Four

Installation consists of seating the two-pin base firmly into the fixture's G9.5 socket until the heat sink contacts the holder, ensuring no pin misalignment. Handle the clear quartz envelope only with clean gloves to prevent hot spots that shorten lamp life. Verify the fixture is rated for 375W at 240V before powering on. Common issues include loose pin contact causing flicker and oil contamination from bare-hand handling.

Highlights

  • 375 W halogen output delivers 7250 lumens for bright studio illumination
  • 240 V G9.5 base with ceramic heat sink ensures stable electrical performance
  • 1000-hour rated life reduces relamping frequency in continuous use
  • 100 CRI at 7250 K provides accurate colour rendering for production work
  • Redesigned ultra-compact filament yields up to 20% more fixture lumens in ETC Source Four

Specifications

BrandUshio
TypeHalogen Bulbs
Wattage375

Questions about this item

Should I choose the 375W 240V version or a different wattage for my fixture?

This model is a 375W 240V HPL lamp; select it only if your fixture specifies 375W at 240V and accepts a G9.5 2-pin base with heat sink.

What does the 7250 lumen rating deliver in an ETC Source Four fixture?

The ultra-compact filament geometry raises fixture output by up to 20% more lumens than the previous lamp design in the same Source Four unit.

How does the G9.5 2-pin base with heat sink affect installation and performance?

The ceramic heat-sink base maintains consistent electrical resistance throughout the 1000-hour rated life and fits fixtures designed for the G9.5 2-pin configuration.

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