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Clear glass halogen bulb with P28s medium prefocus base

SYLVANIA

SYLVANIA 54365 BTH 575W 115V P28s Halogen Bulb

SKU CH-MD5P-PSGPX

Delivers 15500 lumens at 3250K with a CRI of 100 for 300 hours on a P28s base

  • TypeHalogen Bulbs
  • Lumen Range15500
  • Wattage575W
  • Color Temperature3250K
  • Life Time Hours300
  • Color Rendering Index100
  • Brighter output with 15500 lumen halogen performance
  • 3250K color temperature delivers whiter light quality
  • 100 CRI ensures accurate color rendering
  • 300 hour rated life for consistent operation
  • P28s medium prefocus base fits compatible fixtures

Product Identity

The OSRAM 54365 BTH is a 575W halogen bulb operating at 115V with a P28s medium prefocus base. It produces 15500 lumens at 3250K color temperature and a CRI of 100 for stage, studio and projection applications.

Installation Notes

The P28s base seats directly into compatible sockets without tools. Ensure the fixture is rated for 575W at 115V and verify the prefocus alignment before powering on; the 300 hour rated life means lamps will require scheduled replacement in continuous use.

Sustained Operation

The bulb maintains full 15500 lumen output and 3250K colour consistency throughout its 300 hour rated lifespan. Halogen chemistry prevents lumen depreciation typical of other technologies, delivering stable brightness and a CRI of 100 until end of life.

Highlights

  • Brighter output with 15500 lumen halogen performance
  • 3250K color temperature delivers whiter light quality
  • 100 CRI ensures accurate color rendering
  • 300 hour rated life for consistent operation
  • P28s medium prefocus base fits compatible fixtures

Specifications

BrandOSRAM
TypeHalogen Bulbs
Lumen Range15500
Wattage575W
Color Temperature3250K
Life Time Hours300
Color Rendering Index100

Questions about this item

How can I confirm the bulb is performing correctly after installation?

The lamp should produce 15500 lumens at 3250K with a CRI of 100, delivering a brighter, whiter light than the 11000 lumen BTL it replaces.

What comes in the box and what must be purchased separately?

The package contains the OSRAM BTH halogen bulb with a P28s Medium Prefocus base; a compatible 115V fixture or socket is required separately.

Which version should I choose if I need a direct replacement for a 500W 120V BTL lamp?

The 575W 115V BTH model 54365 is the specified replacement, providing 30 percent more lumens at the same 300 hour rated life.

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