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

Ushio

Ushio 1000669 HPL-550/77X+ JS77V-550WX Halogen Bulb

SKU CH-XFF7-7HK6V

550-watt halogen bulb delivers 12,160 lumens at 3,050 K with a CRI of 100 and a 2,000-hour rated life

  • Power rating550 W
  • Light output12160
  • Color temperature3050K
  • Lifespan (hours)2000
  • Color rendering100
  • Product typeHalogen Bulbs
  • High output with 12160 lumens for bright projection
  • Accurate colour rendering at CRI 100 for true tones
  • Warm 3050K colour temperature suits stage environments
  • Compact G9.5 base fits ETC Source Four fixtures
  • 2000-hour rated life reduces replacement frequency

High-output halogen lamp for ETC Source Four

The Ushio 1000669 HPL-550/77X+ is a 550-watt, 77-volt tungsten halogen bulb designed for professional stage and studio lighting. Its G9.5 two-pin base with integrated heat sink fits ETC Source Four ellipsoidal reflectors. The clear T6 envelope produces 12160 lumens at a 3050K colour temperature with a CRI of 100, delivering accurate colour rendition for theatrical productions, film sets and architectural accent lighting.

Rated life of 2000 hours limits continuous run time

The lamp is rated for 2000 hours of operation, which determines maintenance intervals for venues running extended show schedules. Output gradually declines as the filament ages, so colour consistency across multiple fixtures requires coordinated relamping. The 77-volt operating voltage demands compatible dimmer modules and power distribution; the lamp will not strike on standard mains voltage without the correct transformer or dimmer curve.

Replaces earlier HPL 550-watt lamps

The redesigned ultra-compact filament geometry increases optical efficiency by up to 20% compared with previous HPL 550-watt designs, yielding more usable light from the same fixture body. The upgrade is worthwhile when existing lamps are due for replacement and maximum brightness is required without changing fixtures. It is not suited for installations limited to lower-wattage dimmer modules or for applications needing a cooler colour temperature than 3050K.

How it compares

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

Price $17.99
Typical for this category: the median of 1,791 items is $17.99.
Power rating 550 W
Higher than about 79% of the 162 comparable items (median 70 W).

Specifications

Product
Brand nameUshio
Product typeHalogen Bulbs
Display
Light output12160
Power
Power rating550 W
More details
Color temperature3050K
Lifespan (hours)2000
Color rendering100

Questions about this item

How do I know this is the right HPL-550/77X+ version for my fixture?

Match the 1000669 code, 550W rating, 77V supply and G9.5 2-pin base with heat sink; the T6 shape and 2.38 in MOL must also fit the lamp compartment.

What does the 12160 lumen rating deliver in an actual ETC Source Four?

The redesigned ultra-compact filament raises fixture efficiency by about 20%, so the Source Four emits roughly 20% more usable light than with the previous lamp design.

What does the G9.5 2-pin base with heat sink limit in practice?

It locks the lamp to fixtures wired for 77V 550W with that exact base spacing and heat-sink clearance; the 2.38 in light-centre length and 0.72 in diameter must also clear the housing.

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