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GU10 Bulbs

A GU10 bulb is a mains-voltage spotlight lamp with two stubby pins that push into the lampholder and lock with a twist, the cap used in many downlights, spotlight bars and track heads. The GU10 LED lamps on this page are made by Knightsbridge: dimmable 5W and 7W lamps in warm white, cool white or daylight, including retrofit replacements for halogen lamps, and the GU5KWB smart Wi-Fi lamp.

Choosing GU10 Bulbs

Pick a GU10 lamp by light output, colour temperature, beam spread and the dimmer it will run on.

Output and wattage

The 5W Knightsbridge lamps give 500lm to 680lm, and the 7W GU7PDCW and GU7PDWW give 755lm and 720lm. The GU7PDWW is equivalent to a 65W halogen lamp. Compare lumens rather than watts when replacing a lamp.

Colour temperature

Warm white is the softer choice for living rooms and bedrooms: the G5DWW is 2700K, and the GU5PDWW and GU7PDWW are 3000K. The G5DCW, GU5PDCW and GU7PDCW are 4000K cool white, a crisper light for kitchens and work areas, and the GU5PDDL is 6500K daylight.

Beam and dimming

The G5DCW and G5DWW have a 38° beam, the GU5PD lamps 40° and the GU7PD lamps 36°, so a row of downlights overlaps more with the wider beams. The G5DCW, G5DWW, GU5PDCW, GU5PDDL and GU5PDWW are compatible with most trailing and leading edge dimmers, while the GU7PDCW and GU7PDWW are compatible with most trailing edge dimmers.

LampWattsOutputColourBeam
G5DWW5W500lm2700K warm white38°
G5DCW5W570lm4000K cool white38°
GU5PDWW5W645lm3000K warm white40°
GU5PDDL5W665lm6500K daylight40°
GU5PDCW5W680lm4000K cool white40°
GU7PDWW7W720lm3000K warm white36°
GU7PDCW7W755lm4000K cool white36°

Smart GU10

The GU5KWB is a 4.5W smart lamp controlled from a Wi-Fi app, with RGB colour, dimming and white tuning from 2700K to 6500K. It joins 2.4GHz Wi-Fi networks, so check the router offers that band.

Brands we stock in GU10 Bulbs

Knightsbridge.

Every GU10 lamp on this page is made by Knightsbridge.

Related categories

For other caps and shapes see LED bulbs and light bulbs, for app-controlled lamps smart bulbs and lamps, and for fittings that take a GU10 spotlights and downlights.

Frequently asked questions

Can GU10 LED bulbs be dimmed?

Yes, GU10 LED bulbs can be dimmed when the lamp is marked dimmable and the dimmer suits LED loads. Many dimmable LED lamps work well on a trailing edge dimmer, and the dimmer's minimum load should suit the number of lamps on the circuit. A non-dimmable lamp on a dimmer may flicker or buzz. The range here includes dimmable LED spotlight lamps.

What is a warm dim GU10 LED?

A warm dim GU10 LED shifts its light towards a warmer, more amber white as it is dimmed, much as a halogen lamp does. At full output it gives a normal white, then turns cosier at low levels, which suits living and dining rooms. Look for warm dim or dim-to-warm on the packaging, because a standard dimmable LED keeps the same colour as it dims.

How do you remove a GU10 bulb?

To remove a GU10 bulb, switch off and let it cool, then push it gently into the holder and turn it anticlockwise about a quarter turn until the pins release. If the lamp sits flush in a downlight, a small suction cup can give enough grip. Fit the new lamp by lining up the pins, pushing in and turning clockwise.

What is a GU10 bulb?

A GU10 bulb is a mains-voltage spotlight lamp with a twist-and-lock cap: two stubby pins with wider ends that lock into the holder. It is widely used in downlights and spotlights, and LED versions replace older halogen lamps while using far less power. The range here includes standard dimmable lamps and a smart Wi-Fi lamp.

  • Established 1975
  • Birmingham trade counter
  • UK-only supply

Written by the West Midlands Electrics technical team

Updated

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