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Clear T6 halogen bulb with G9.5 two-pin heat-sink base, 4.09 inches long

Ushio

Ushio 1000672 HPL-575/120V+ JS120V-575WC halogen standard bulb

SKU CH-4DDG-XR8FA

Halogen projector bulb delivering 16520 lumens at 3250K with a 300-hour rated life and G9.5 base

  • Power rating575 W
  • Light output16520
  • Color temperature3250K
  • Lifespan (hours)300
  • Color rendering100
  • Product typeHalogen Bulbs
  • Bright 16520-lumen output for stage and studio use
  • 575 W halogen lamp delivers high-intensity light
  • 3250 K colour temperature gives warm white illumination
  • 300-hour rated life supports extended production runs
  • G9.5 2-pin base with heat sink fits ETC Source Four fixtures

High-output halogen projector lamp

The Ushio 1000672 HPL-575/120V+ is a 575 watt 120 volt halogen bulb designed for ETC Source Four fixtures. It delivers 16520 lumens at a 3250K colour temperature with a CRI of 100. The T6 envelope measures 4.09 inches overall length and 0.72 inches diameter. A G9.5 2-pin base with integrated heat sink ensures secure mounting.

Redesigned filament for legacy HPL sockets

The 4-C8 ultra-compact filament geometry raises fixture lumen output by roughly 20 percent compared with the earlier HPL design. This gain applies directly to existing Source Four housings without rewiring or ballast changes. Rated life remains 300 hours at full power. The upgrade is worthwhile when maximum intensity from the current fixture is the priority.

Stage and studio lighting professionals

This lamp suits operators who need the highest possible output from a standard HPL socket and accept the 300-hour service interval. Venues requiring longer relamp cycles or lower power draw should consider alternative lamp types. Buyers needing a different base configuration or voltage must select a compatible model.

How it compares

Measured against everything we stock in General-Purpose & Specialty Bulbs, at today’s prices. Recalculated every night.

Price $16.99
Typical for this category: the median of 1,791 items is $17.99.
Power rating 575 W
Higher than about 80% of the 162 comparable items (median 70 W).

Specifications

Product
Brand nameUshio
Product typeHalogen Bulbs
Display
Light output16520
Power
Power rating575 W
More details
Color temperature3250K
Lifespan (hours)300
Color rendering100

Questions about this item

Will the G9.5 2-pin base with heat sink fit my ETC Source Four fixture?

Yes — the G9.5 2-pin base with integrated heat sink is the standard interface for ETC Source Four fixtures, and the 4.09-inch overall length matches the fixture's lamp compartment.

What is the correct way to seat the lamp so the heat sink contacts the fixture's thermal path?

Align the two pins with the socket, push straight in until the ceramic base sits flush, then give a slight clockwise twist to lock the heat sink against the fixture's cooling plate — skipping the twist leaves an air gap that causes early failure.

How often should I plan to replace this 575 W halogen lamp?

Rated life is 300 hours; at typical theatre use of four hours per show, expect to replace it roughly every 75 performances or when output noticeably dims.

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