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Small clear S-8 incandescent bulb with P15d prefocus base

Ushio

Ushio SM-1630 6.5V 17.88W P15d Standard Bulb

SKU CH-4KPY-5CAJJ

A 6.5 V, 17.88 W incandescent bulb with a P15d base delivering 289 lumens for 100 hours of rated life

  • TypeIncandescent Bulbs
  • Lumen Range289
  • Wattage17.88
  • Life Time Hours100
  • Reliable illumination for medical devices with 289 lumen output
  • Precise 6.5 V operation matches equipment power requirements
  • Compact 48.0 mm length fits tight instrument housings
  • Secure P15d prefocus base ensures consistent alignment
  • 100 hour rated life supports scheduled maintenance intervals

Purpose-built medical and scientific illumination

The Ushio SM-1630 is a 6.5V incandescent bulb rated at 17.88W and 289 lumens. It uses a P15d DC prefocus base and an S-8 envelope measuring 25.0mm in diameter. The lamp is intended for healthcare and scientific equipment requiring precise alignment and a C-6U filament.

Thermals noise and power in normal use

The bulb draws 17.88 watts at 6.5 volts and produces 289 lumens of clear output. As an incandescent source it generates noticeable heat during its 100-hour rated life. No active cooling or fan noise is present; the fixture must tolerate the thermal load of continuous operation.

Build integration and what it frees up

The 48.0mm overall length and 1.000in light centre length allow direct replacement in devices specifying the ANSI SM-1630 code. The P15d base ensures correct electrical and mechanical fit without adapters. It is not suited for general lighting, long-life installations or fixtures requiring a different base type or voltage.

Highlights

  • Reliable illumination for medical devices with 289 lumen output
  • Precise 6.5 V operation matches equipment power requirements
  • Compact 48.0 mm length fits tight instrument housings
  • Secure P15d prefocus base ensures consistent alignment
  • 100 hour rated life supports scheduled maintenance intervals

Specifications

BrandUshio
TypeIncandescent Bulbs
Lumen Range289
Wattage17.88
Life Time Hours100

Questions about this item

How do I install the P15d base correctly and avoid the common mistake?

Align the two pins with the socket slots, push straight in until the base seats fully, then give a slight clockwise twist to lock; forcing it without the twist leaves the contacts loose and causes flicker.

What maintenance or replacement will this 100-hour bulb need?

After roughly 100 hours of continuous use the filament will fail; keep a spare SM-1630 on hand and replace the lamp when output drops or the bulb darkens.

What limit appears first during sustained operation of this 17.88 W lamp?

The 100-hour rated life is the limiting factor; the filament will burn out long before heat or voltage stress becomes an issue.

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