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Ushio 18W double-tube fluorescent bulb, 4-pin base, cool white 4100K

Ushio

Ushio CF18DE/841 18W Dimmable Fluorescent Bulb

SKU CH-040J-NKSYZ

An 18W dimmable fluorescent bulb delivering 1200 lumens at 4100K with a CRI of 82 and 10000-hour life

  • TypeFluorescent Bulbs
  • Lumen Range1200
  • Wattage18
  • Color Temperature4100K
  • Life Time Hours10000
  • Color Rendering Index82
  • Bright 1200-lumen output from an 18-watt fluorescent tube
  • Dimmable operation lets you adjust light levels to suit the task
  • 4100K cool-white colour temperature gives a crisp, neutral appearance
  • CRI 82 renders colours accurately for everyday use
  • Rated 10000 hours for long service life

Compact 18W Dimmable Fluorescent

This Ushio CF18DE/841 is an 18-watt compact fluorescent bulb designed for fixtures with electronic ballasts. It delivers 1200 lumens at a 4100K colour temperature with a colour rendering index of 82. The double-tube, four-pin base suits commercial or residential recessed fittings that support dimming control.

Steady Output Over 10000 Hours

Rated life is 10000 hours under normal cycling on compatible electronic ballasts. Lumen maintenance remains consistent through the rated span when the ballast supplies stable current. Frequent short cycles or operation on magnetic ballasts will reduce actual lifetime and may cause flicker.

Check Ballast and Dimmer Compatibility

Verify the fixture uses a four-pin electronic ballast rated for 18W dimmable lamps. Magnetic ballasts or non-dimmable electronic units will not strike the lamp or will prevent dimming. Ensure the dimmer controller is approved for compact fluorescent loads before ordering.

Highlights

  • Bright 1200-lumen output from an 18-watt fluorescent tube
  • Dimmable operation lets you adjust light levels to suit the task
  • 4100K cool-white colour temperature gives a crisp, neutral appearance
  • CRI 82 renders colours accurately for everyday use
  • Rated 10000 hours for long service life

Specifications

BrandUshio
TypeFluorescent Bulbs
Lumen Range1200
Wattage18
Color Temperature4100K
Life Time Hours10000
Color Rendering Index82

Questions about this item

How much heat or power does the 18W fluorescent bulb draw when it runs all day?

The lamp draws 18 watts continuously; fluorescent technology runs cooler than incandescent equivalents, so heat output stays modest during extended use.

What fixture or ballast must I already have for the 4-pin CF18DE/841 to operate?

It requires a compatible electronic ballast designed for 18W double-tube compact fluorescent lamps with a 4-pin base.

Will the 4100K, 82 CRI light match the older fluorescent tubes I am keeping in the same room?

Its 4100K cool-white colour and 82 CRI are typical for office-grade fluorescents, so it blends well with existing tubes of the same specification.

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