GU10 LED Bulb 3.6W 345lm Non-Dimmable - Cool White 4000K

This is a GU10 LED spotlight rated at 3.6W, giving 345 lumens of 4,000K cool white light through a 36 degree beam. The retail pack puts it forward as a replacement for a 50W halogen spotlight, so the drop in running wattage is substantial while the light output stays in the same bracket. The lamp uses the standard twist and lock GU10 cap with two pins, runs straight off mains voltage with no separate transformer, and carries an E energy rating. The pack prints a 15 year lifespan, based on 15,000 hours of use.

GU10 spotlights are the fitting most kitchens, hallways and living rooms use for recessed downlights and for track and bar fittings. A 36 degree beam is on the narrow side, throwing a defined pool of light rather than a broad wash, which is useful over a worktop, a run of shelving, artwork or an island where you want the light to land somewhere in particular. Cool white at 4,000K reads as crisp and neutral rather than yellow, so it suits working areas, utility rooms and garages, and it sits well against white paint, stainless steel and pale stone. If you would rather have a warmer light in the same lamp, we also stock the 3.6W GU10 at 3000K warm white, and mixing the two in one ceiling is worth avoiding because the difference is obvious side by side.

This lamp is not dimmable, and the pack carries the crossed out dimmer icon, so put it on a plain on and off switch rather than a trailing edge dimmer. Its IP20 rating means dry indoor positions only. Each unit is a single boxed bulb, and the minimum order is 12, sold in multiples of 12, which suits doing a whole ceiling in one go and keeping a couple spare.

Will this fit my existing spotlights?

It fits any GU10 holder, the type with two small pins that push in and twist a quarter turn to lock. GU10 runs on mains voltage, so check the old lamp is not a 12V MR16 pin type first.

How bright is 345 lumens next to my old halogen?

The pack gives this as a 50W halogen replacement, so on a worktop or a shelf you should see a comparable pool of light while drawing only 3.6W.

Can I use it on a dimmer switch?

No, it is non-dimmable. Wired to a dimmer circuit it may flicker, buzz or fail early, so give it a plain on and off switch.

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

It is a neutral, crisp white with no yellow cast, brighter in feel than a 2700K or 3000K lamp and easier for close work such as chopping, reading labels or hobby tasks.

How wide a spread does the 36 degree beam give?

It is a fairly tight cone, so each lamp lights a defined circle below it. For even coverage across a ceiling, space the fittings closer than you would with a wide angle lamp.

How long should it last, and what does an E rating mean?

The pack prints a 15 year lifespan based on 15,000 hours of use. The energy label runs from A down to G, with A the most efficient, so E sits in the middle of the current scale.