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Ushio 18W double-tube 4-pin fluorescent bulb, cool white finish

Ushio

Ushio CF18DE/835 18W 3500K 1200lm 10000h Dimmable Fluorescent Bulb

SKU CH-818K-0S8TT

An 18 W dimmable fluorescent bulb delivering 1200 lm at 3500 K with a CRI of 82 and a 10 000-hour rated life

  • TypeFluorescent Bulbs
  • Lumen Range1200
  • Wattage18
  • Color Temperature3500K
  • Life Time Hours10000
  • Color Rendering Index82
  • Bright 1200 lumen output from just 18 watts
  • Warm 3500K colour temperature suits living spaces
  • Dimmable design works with electronic ballasts
  • 10000 hour rated life reduces replacement frequency
  • CRI 82 renders colours accurately

Ushio 18W Dimmable Fluorescent Bulb

This 18 watt compact fluorescent lamp delivers 1200 lumens at a 3500K colour temperature. It is designed for fixtures that use electronic ballasts and supports dimming operation. The double tube design suits commercial and residential lighting where consistent output is required. A colour rendering index of 82 provides acceptable colour fidelity for general tasks.

Four-Pin Base for Electronic Ballasts

The 4-pin base connects directly to compatible electronic ballasts without a separate starter. This interface enables the dimmable function when paired with a suitable dimming ballast. The double tube construction keeps the lamp length compact for recessed or surface-mounted fittings. Installation is a simple push-and-twist action into the matching socket.

Check Ballast Compatibility Before Ordering

Verify that the existing fixture uses an electronic ballast rated for 18W 4-pin compact fluorescent lamps. Magnetic ballasts or 2-pin sockets will not operate this bulb correctly. Dimming requires a ballast specifically designed for dimming control. Buyers who need a different wattage, pin configuration, or non-dimmable lamp should select an alternative model.

Highlights

  • Bright 1200 lumen output from just 18 watts
  • Warm 3500K colour temperature suits living spaces
  • Dimmable design works with electronic ballasts
  • 10000 hour rated life reduces replacement frequency
  • CRI 82 renders colours accurately

Specifications

BrandUshio
TypeFluorescent Bulbs
Lumen Range1200
Wattage18
Color Temperature3500K
Life Time Hours10000
Color Rendering Index82

Questions about this item

Does the 4-pin base work with a dimmable electronic ballast?

Yes, the 18 W double-tube lamp is built for electronic ballasts that support dimming.

What fixture dimensions suit this double-tube compact fluorescent?

The lamp uses a standard 4-pin base; the housing must accept a double-tube CFL of 18 W rating.

How is the bulb installed and what step is often missed?

Align the four pins with the socket, push straight in until seated, then confirm the ballast is dimmable or the lamp will not dim.

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