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Satco S4189 20W ALR12 halogen bulb with frost finish and bayonet double contact base

Satco

Satco S4189 20W ALR12 Halogen Light Bulb Frost

SKU CH-JWQ7-82NRT

20 W halogen ALR12 bulb with bayonet double-contact base and frosted finish

  • 20 W halogen output for bright task lighting
  • ALR12 compact reflector fits tight machine-shop fixtures
  • Bayonet double-contact base enables quick tool-free replacement
  • Frosted finish diffuses glare on polished surfaces
  • SATCO brand recognised in industrial supply channels

What this halogen bulb does

The Satco S4189 is a 20-watt ALR12 halogen lamp with a bayonet double contact base and a frosted finish. It supplies focused illumination for machinery, inspection stations or automotive work areas where a compact, high-output source is required. Buyers who need a different base type, a non-frosted envelope or a lower wattage for the same fixture should look elsewhere.

Capacity and headroom

At 20 watts the lamp delivers bright, white halogen light suitable for close-up tasks and general machine-shop lighting. The ALR12 reflector pattern concentrates output where it is needed, but the fixed wattage means it cannot be dimmed below 20 watts or driven harder for more lumens. Installations that demand variable intensity or higher total output will need additional or alternative fixtures.

Bayonet double contact base fit

The double-contact bayonet base determines whether this bulb seats and powers correctly in the target socket. Verify the fixture accepts a BDC base before ordering; a single-contact or screw-base holder will not work. No other specification overrides this mechanical and electrical match.

Highlights

  • 20 W halogen output for bright task lighting
  • ALR12 compact reflector fits tight machine-shop fixtures
  • Bayonet double-contact base enables quick tool-free replacement
  • Frosted finish diffuses glare on polished surfaces
  • SATCO brand recognised in industrial supply channels

Specifications

BrandSATCO

Questions about this item

Will the 20W ALR12 halogen bulb work in my older bayonet double contact fixture?

Yes, the bayonet double contact base matches fixtures designed for that fitting, and the 20W draw is within typical limits for ALR12-rated sockets.

How can I confirm the frost finish is diffusing light as intended once installed?

Switch the lamp on; the frost coating should produce an even, glare-free glow without visible filament hot-spots across the lens.

Does the S4189 pack include any extra bases or adapters, or just the bulb?

Only the single 20W ALR12 halogen bulb with its integral bayonet double contact base is supplied; no adapters or additional hardware are included.

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