GU10 LED Bulb 3.6W 345lm Non-Dimmable - Warm White 3000K

This is a GU10 LED spotlight rated at 3.6W and giving 345 lumens, with a colour temperature of 3000K. The GU10 cap is the two pin twist and lock fitting used on mains voltage downlights and track spots, so there is no transformer to match and no driver to buy separately. The light leaves the front of the bulb in a 36 degree cone rather than spreading in every direction, which is the difference between a spotlight and a general purpose bulb. Each box holds one bulb.

A 36 degree beam is a narrow one, and it suits any job where you want the light to land somewhere in particular: over a kitchen worktop, down the face of a run of shelves, onto a picture or into an alcove. Spaced along a ceiling it gives pools of light rather than an even wash, so if you are lighting a whole room evenly you will want more fittings than a wide beam bulb would need. At 3000K the light is warm without being yellow, a shade crisper than an old filament bulb but still easy to live with in a living room, a hallway or a kitchen, and it reads well against wood, brick and warm paint colours.

This bulb is not dimmable, so put it on a plain on/off switch. A non dimmable LED wired to a dimmer circuit will usually flicker, buzz or fail early, so check the switch before you order. Energizer prints a 15 year lifespan on the pack, based on 15,000 hours, and the energy rating is E. The IP rating is IP20, for dry indoor positions. It is sold as a single bulb with a minimum order of 12, in multiples of 12, which makes it a sensible buy when you are refitting a whole run of spots. It sits alongside our wider range of LED bulbs, including B15 candle and golf shapes and E27 filament types.

Will this fit my existing halogen spotlights?

If the old bulb has two stubby pins that push in and twist a quarter turn to lock, it is a GU10 and this will fit. Two thin straight pins that pull out means GU5.3 or MR16, which is a different cap.

How bright is 345 lumens against the halogen I am replacing?

The retail pack states this as a 50W replacement. Lumens measure the light itself rather than the power drawn, so 345 lumens in a narrow cone reads as a similar pool of light from 3.6W.

Can I put it on a dimmer switch?

No. The specification lists it as non dimmable, so it needs a standard on/off switch. On a dimmer circuit expect flicker, audible buzz from the switch, or an early failure of the bulb.

What does a 36 degree beam angle mean in practice?

It throws a defined circle rather than a broad wash. From a ceiling at around 2.4m you get a pool roughly 1.5m across, which is why it works well over worktops, artwork and shelving.

What does the E energy rating tell me?

It places the bulb on the current EU and UK scale for lumens produced per watt drawn. At 3.6W for 345 lumens, running costs stay low whatever position the letter sits at.

Do I need 12 of them?

The minimum order is 12 units and they are sold in multiples of 12, so this listing suits refitting a full run of ceiling spots rather than swapping a single failed bulb.