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

A GU10 LED spotlight drawing 3.6W and giving 345 lumens of 4000K cool white light in a 36 degree cone. The GU10 cap is the two pin twist and lock fitting used in most modern ceiling spotlights and track heads, so if the bulb you are replacing has two stubby pins about 10mm apart rather than a screw thread, this is the one you need. The retail pack states a 50W replacement, which is the halogen wattage it stands in for, and marks the bulb as dimmable.

4000K is the crisp, slightly blue leaning white that reads as clean rather than cosy. It suits kitchens, utility rooms, home offices, garages and workshops, where you want to see edges and colours clearly; if you are lighting a lounge or a bedroom and want a warmer, yellower light, a 2700K or 3000K bulb is the better choice. The 36 degree beam is a fairly tight cone, so light lands in a defined pool rather than washing the whole room. Spaced at roughly a metre apart across a kitchen ceiling, a run of these gives good working light over worktops; aimed from a track, they pick out shelving, artwork or a bar area.

Dimming needs a dimmer switch rated for LED loads; an older halogen dimmer expecting 50W per lamp will often flicker or buzz with a 3.6W bulb, so check what your dimmer is rated for before fitting. The energy rating is E, and the pack prints a 15 year lifespan based on 15,000 hours of use. It carries an IP20 rating, so it is intended for dry indoor positions. Each unit is a single bulb and the minimum order is 12, sold in multiples of 12. It sits alongside our wider range of LED bulbs in cool white 4000K, including B15 (SBC) candle and golf shapes.

Will this fit my existing halogen spotlights?

If the old bulb pushes in and twists a quarter turn on two stubby pins, it is a GU10 and this replaces it directly. A pin fitting with thin wire pins is GU5.3 or MR16 and will not fit.

How bright is 345 lumens compared with the 50W halogens I have now?

The pack rates it as a 50W replacement, and the 345 lumens are concentrated into a 36 degree cone rather than spread widely, so the pool of light on a worktop or shelf reads as comparable.

What sort of dimmer switch do I need?

Use a dimmer designed for LED loads. Older halogen dimmers are built for much higher wattages and can cause flicker, buzzing or a limited dimming range when asked to control a 3.6W lamp.

How does 4000K cool white compare with warm white?

4000K is a neutral, slightly cool white that shows colours and detail crisply, good for kitchens and work areas. Warm white at 2700K or 3000K is yellower and softer, and suits living rooms better.

How many bulbs do I receive?

Each unit is one bulb in its own box. The minimum order on this listing is 12 units, sold in multiples of 12, so a single order gives you twelve bulbs.

Does the beam angle suit ceiling downlights?

Yes. A 36 degree beam is on the narrow side, which gives defined pools of light, so plan roughly a metre between fittings if you want even coverage across a ceiling.