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Frosted tubular halogen bulb with GZ9.5 base

SYLVANIA

SYLVANIA 58941 235W 33V T12 Frosted GZ9.5 Halogen Standard Bulb

SKU CH-F7SF-S1SP9

A 235-watt, 33-volt halogen bulb with a frosted T12 envelope and GZ9.5 base delivering 5800 lumens at 3250 K

  • Power rating235
  • Light output5800
  • Color temperature3250K
  • Lifespan (hours)200
  • Color rendering100
  • Product typeHalogen Bulbs
  • Bright 5800 lumen output from 235 watt halogen
  • Precise 33 volt operation with GZ9.5 base
  • Perfect 100 CRI renders colours accurately
  • Warm 3250K light suits stage and studio
  • 200 hour rated life for short-run applications

High-wattage halogen bulb for 33 V fixtures

The SYLVANIA 58941 is a 235 W tungsten halogen lamp built for low-voltage circuits without a reflector. It produces 5800 lumens at a 3250 K colour temperature and carries a colour rendering index of 100. The GZ9.5 base fits compatible sockets in professional and specialist lighting equipment. Rated life is 200 hours.

Frosted envelope diffuses output evenly

The frosted T12 glass softens the filament glare and spreads light more uniformly than a clear capsule. This reduces hot-spots on subjects and eases integration into soft-boxes or follow-spots where even illumination matters. No additional diffusion accessories are required to achieve this effect.

Verify 33 V supply and GZ9.5 socket before ordering

The lamp only operates on a 33 V system; connecting it to mains voltage will destroy it instantly. Confirm the fixture accepts a GZ9.5 bi-pin base and that the circuit can deliver 235 W continuously. Buyers needing longer service intervals or higher efficacy should consider alternative lamp technologies.

How it compares

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

Price $22.99
Pricier than about 60% of the 1,791 comparable items (median $17.99).

Specifications

Product
Brand nameOSRAM
Product typeHalogen Bulbs
Display
Light output5800
Power
Power rating235
More details
Color temperature3250K
Lifespan (hours)200
Color rendering100

Questions about this item

How often will the 235 W halogen capsule need replacement at its rated 200-hour life?

The lamp is rated for 200 hours of operation; at typical daily use it will require replacement once those hours are reached.

What is the first limit reached during continuous operation — the 200-hour life or the 5 800 lumen output?

The rated 200-hour life is the limiting factor; lumen output is specified for the full rated life.

How much heat does the 235 W T12 capsule produce when run all day on a 33 V supply?

At 235 watts the bulb converts nearly all input power into heat, so the fixture must handle sustained high-temperature operation.

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