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Small clear halogen capsule 1.8 inches long .551 inches wide with SPEC base

Ushio

Ushio SM-74000 120W 24V SPEC Base Halogen Bulb

SKU CH-197X-4TBXH

A 120 W, 24 V halogen lamp with a special base delivers 3000 lumens at 3250 K and a 99 CRI for scientific or medical use

  • Power rating120
  • Light output3000
  • Color temperature3250K
  • Lifespan (hours)200
  • Color rendering99
  • Product typeHalogen Bulbs
  • Exceptional colour accuracy with a CRI of 99
  • Bright 3000 lumen output from a 120 watt halogen lamp
  • Warm 3250K colour temperature suits scientific and medical tasks
  • Compact 45.7 mm length and 14.0 mm diameter fit specialised fixtures
  • Rated for 200 hours average life at 24 volts

Scientific and medical halogen lamp

The Ushio SM-74000 is a 120 watt halogen bulb that operates at 24 volts and delivers 3000 lumens at a colour temperature of 3250 kelvin. It is designed for scientific and medical equipment that requires a special SPEC base and a high colour rendering index of 99.

Verify voltage base and physical fit

Before ordering confirm that your device accepts a 24 volt supply and a SPEC base type. The lamp measures 1.800 inches in overall length and 0.551 inches in diameter, which is equivalent to 45.7 millimetres by 14.0 millimetres. Cross-reference the part number 8000230 or BC4757 with your equipment manual.

Heat output and rated life

At 120 watts the bulb generates significant heat during its 200 hour rated life so ensure the fixture provides adequate ventilation. The clear finish and halogen fill maintain consistent output but the envelope runs very hot and should not be handled until cooled. Power draw is fixed at 120 watts on a 24 volt circuit.

How it compares

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

Price $19.99
Typical for this category: the median of 1,791 items is $17.99.

Specifications

Product
Brand nameUshio
Product typeHalogen Bulbs
Display
Light output3000
Power
Power rating120
More details
Color temperature3250K
Lifespan (hours)200
Color rendering99

Questions about this item

What comes in the box and is any extra hardware needed for installation?

The box contains one Ushio SM-74000 halogen bulb with a SPEC base; no additional hardware is required if the fixture accepts a SPEC base.

Which specification should I match to ensure I choose the correct replacement?

Match the ANSI code SM-74000, 120W at 24V, and the SPEC base type to confirm compatibility with your equipment.

What does the 3000 lumen rating mean in actual use?

The bulb delivers 3000 lumens at 3250K with a CRI of 99 for 200 hours of rated life before output declines.

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