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Small clear glass S11 incandescent lamp with BA15d double-contact bayonet base

Ushio

Ushio CAX/CAW 50W 120V BA15d standard bulb

SKU CH-SJA9-YMG60

50 W incandescent projection lamp with BA15d base delivers 775 lumens at 2900 K for microscope and medical equipment

  • Power rating50
  • Light output775
  • Color temperature2900K
  • Lifespan (hours)50
  • Product typeIncandescent Bulbs
  • Bright 775-lumen output from a 50-watt incandescent lamp
  • Warm 2900K colour temperature suits medical and stage use
  • BA15d double-contact bayonet base fits microscope and fibre-optic gear
  • ANSI-coded CAX/CAW ensures correct replacement in projection equipment
  • Average 50-hour rated life for specialised illumination tasks

Projection lamp for medical and lab equipment

The Ushio CAX/CAW is a 50-watt incandescent bulb built for microscopes, fiber-optic systems, surgical lighting and dental devices. It delivers 775 lumens at a warm 2900 Kelvin colour temperature. The BA15d double-contact bayonet base fits the sockets used in many diagnostic and inspection instruments.

BA15d base and 120-volt rating

Compatibility hinges on the BA15d bayonet base and the 120-volt supply requirement. The lamp will only operate correctly in fixtures that provide this exact base type and voltage. Using it in a different socket or voltage will prevent operation and may damage the equipment.

Short 50-hour rated life under continuous use

The average rated life is 50 hours, so the filament degrades quickly during extended sessions. Light output and colour stability will shift as the bulb approaches this limit. Plan replacements around critical procedures to avoid unexpected failure during long examinations or surgeries.

How it compares

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

Price $10.99
Cheaper than about 73% of the 1,791 comparable items (median $17.99).

Specifications

Product
Brand nameUshio
Product typeIncandescent Bulbs
Display
Light output775
Power
Power rating50
More details
Color temperature2900K
Lifespan (hours)50

Questions about this item

How bright will the 775-lumen output actually be in a microscope or projector?

At 775 lumens the lamp delivers a concentrated white beam suited to microscope illumination, fibre-optic coupling and surgical lighting where high intensity in a small area is required.

What does the BA15d base limit in terms of voltage and mounting?

The BA15d double-contact bayonet locks into a 120 V socket and prevents accidental cross-threading, so the lamp only fits fixtures designed for that base and voltage.

Will the S11 spherical envelope fit the lamp housing on my dental or inspection equipment?

The straight-sided S11 bulb measures to the standard ANSI CAX/CAW envelope, so it seats correctly in microscope, ophthalmic and industrial inspection housings built for that form factor.

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