GU10 LED Bulb 3.1W 250lm Non-Dimmable - Cool White 4000K

This is a GU10 LED spotlight bulb drawing 3.1W and giving 250 lumens of cool white light at 4,000K. The cap is the standard GU10 type: two short pins that push into the holder and twist a quarter turn to lock, so it drops straight into the recessed downlights and track spots most UK homes already have. The body is white with a flat diffusing front rather than a clear lens, and the light spreads across 110 degrees instead of the tight cone an older halogen spot threw. The pack rates it as the replacement for a 35W conventional spot.

A 110 degree beam is what you want when the aim is an even wash of light rather than bright pools on the floor. With four or six spots set into a kitchen ceiling, that wider spread keeps the worktop lit between the fittings instead of leaving shadowed gaps, and it works the same way over a dining table or down a hallway. Cool white at 4,000K reads crisp and slightly blue beside the yellower 2,700K and 3,000K lamps, which suits kitchens, utility rooms, garages, home offices and stairwells where seeing clearly matters more than a soft glow.

Control is simple, because there is none: the specification lists this lamp as non-dimmable, so give it an ordinary on/off switch. On a dimmer circuit a non-dimmable LED will usually flicker, buzz or refuse to light below full output. The pack prints a 10 year, 10,000 hour lamp life and more than 10,000 on/off switching cycles, useful on a stair or hallway light that gets flicked several times an hour. Energy class is G, at 4kWh per 1,000 hours. One unit is a single bulb, and the minimum order is 5, sold in multiples of 5. Our wider range of these LED bulbs also runs to candle and golf shapes in B15 fittings and GLS lamps in E27.

Will this fit my existing GU10 downlights?

Yes, provided the holder takes a GU10 twist-lock cap. Push the two pins in and turn a quarter circle to lock it. The lamp runs on mains voltage at 220-240V, so no transformer is involved.

How bright is 250 lumens in practice?

The pack rates the 250 lumens as a match for a 35W conventional spot, so plan on several fittings to light a whole room rather than expecting one lamp to do the work.

Can I put it on a dimmer switch?

No. The specification lists it as non-dimmable, so it needs a plain on/off switch. On a dimmer it will most likely flicker, buzz or fail to light at all.

What does 4,000K cool white actually look like?

A clean, slightly blue white that looks brighter than 2,700K or 3,000K warm white. The pack also prints a colour rendering index above 80, so colours hold up well under it.

Does a 110 degree beam suit spot fittings?

It does. At 110 degrees the light opens out and evens up the coverage between ceiling spots. Choose a narrower beam only where you want a tight pool on a picture or a display piece.

How many bulbs do I receive, and is there a minimum order?

Each unit is one bulb in its own box. The minimum order is 5 units, sold in multiples of 5, so the smallest purchase works out at five bulbs.