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Clear T6 halogen lamp with G9.5 2-pin base and heat sink

Ushio

Ushio 1000668 HPL-550/77V+ JS77V-550WC 550W 77V halogen standard bulb

SKU CH-YVWT-W3XTX

550 W halogen lamp with G9.5 base delivers 16,170 lumens at 3,250 K for ETC Source Four fixtures

  • TypeHalogen Bulbs
  • Lumen Range16170
  • Wattage550
  • Color Temperature3250K
  • Life Time Hours300
  • Color Rendering Index100
  • High-output 16,170 lumens for bright projection
  • Perfect 100 CRI renders colours faithfully
  • 20 % more fixture lumens via ultra-compact filament
  • 77 V 550 W halogen matches ETC Source Four specs
  • 300-hour rated life for reliable stage runs

High-output halogen lamp for stage fixtures

The Ushio 1000668 HPL-550/77V+ is a 550-watt tungsten halogen bulb rated at 77 volts. It delivers 16170 lumens at a 3250K colour temperature with a CRI of 100. The G9.5 two-pin base with integrated heat sink fits ETC Source Four fixtures. It is built for professional stage and studio lighting applications.

Consistent output over the rated lifespan

The lamp maintains its photometric performance across the 300-hour rated life. Its ultra-compact 4-C8 filament geometry improves optical efficiency in compatible fixtures by up to 20 percent. The clear T6 envelope and precise 60.3 mm light centre length ensure stable beam focus throughout extended runs.

Direct replacement for earlier HPL designs

This model supersedes previous HPL lamps with the same base and voltage rating. The jump is worthwhile when a production demands higher fixture lumens without changing hardware. It is not suited for installations requiring longer service intervals or lower power draw.

Highlights

  • High-output 16,170 lumens for bright projection
  • Perfect 100 CRI renders colours faithfully
  • 20 % more fixture lumens via ultra-compact filament
  • 77 V 550 W halogen matches ETC Source Four specs
  • 300-hour rated life for reliable stage runs

Specifications

BrandUshio
TypeHalogen Bulbs
Lumen Range16170
Wattage550
Color Temperature3250K
Life Time Hours300
Color Rendering Index100

Questions about this item

How much heat does the 550W halogen filament produce during long shows?

At 550W draw the lamp emits substantial heat; the integrated G9.5 heat-sink base helps conduct it away from the socket, but fixture ventilation must handle the full wattage.

Which fixture socket and voltage must I already have for this G9.5 2-pin lamp?

The lamp requires an ETC Source Four or compatible fixture with a G9.5 2-pin heat-sink socket supplied with 77V.

Will the 3250K output and 60.3 mm LCL match my older HPL lamps in the same rig?

Yes — 3250K colour temperature, 60.3 mm light-centre length and T6 envelope match legacy HPL spacing, while the 4-C8 filament yields up to 20% more fixture lumens.

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