GU10 LED Bulb 4.7W 320lm Non-Dimmable - Daylight 6500K, 2 Pack

This is a GU10 LED spotlight rated at 4.7W, and it comes two to a box. Each lamp puts out 320 lumens at 6,500K, the colour temperature sold as daylight: a clean, blue-leaning white rather than the yellow of an older halogen spot. The retail pack rates it as the equivalent of a 35W conventional spotlight, so the light level sits close to a standard halogen while the power draw is a fraction of it. The pack also prints a 10 year lamp life, and the energy rating is G.

GU10 is the twist and lock cap found in most UK ceiling downlights, track spots and under cupboard fittings. If the lamp you are replacing has two small pins on its base that push in and turn a quarter turn to lock, this is the right cap for you. Daylight at 6,500K suits places where you want to see clearly and judge colour accurately: kitchen worktops, a utility room, a garage bench, a home office or a glass display cabinet. In a sitting room or a bedroom it will read as cool and bright, so a warm white lamp is usually the happier choice there.

These lamps are not dimmable, so wire them to an ordinary on and off switch. Fitted to a dimmer they may flicker, buzz or fail early. They run on a 220 to 240V mains supply and need no separate driver or transformer. The IP rating is IP20, which offers no protection against water, so keep them to dry indoor positions. One box holds two lamps and the minimum order is six boxes, sold in multiples of six, giving twelve lamps, which is useful when relamping a whole ceiling at once so every fitting matches. We also stock candle, golf, filament GLS and pygmy bulbs in warm white, cool white and daylight.

Will these fit my existing GU10 downlights?

Yes, provided the old lamp has the two stubby pins that push in and twist a quarter turn to lock. That cap is GU10 and it is the same on this lamp, so no rewiring or adaptor is needed.

How bright is 320 lumens compared with my old halogen spot?

The pack rates it as the equivalent of a 35W conventional spotlight. If you are coming from 50W halogens you will notice a little less punch, so plan on a slightly closer spacing for the same effect.

Can I put these on a dimmer switch?

No. The specification lists them as not dimmable, so they need a plain on and off switch. Running a non-dimmable lamp on a dimmer can cause flicker, audible buzz and a shortened life.

What does 6,500K daylight actually look like?

It is a crisp, slightly blue white, the coolest of the common domestic options. It keeps whites looking white and makes detail easy to read, which is why it works well over worktops and workbenches.

Do they need a driver or transformer?

No. GU10 lamps run straight off the 220 to 240V mains, so they wire into a standard mains voltage fitting without any extra control gear behind the ceiling.

How many lamps do I actually receive?

One unit of this listing is a box containing two lamps. The minimum order is six boxes, sold in multiples of six, so a first order brings twelve lamps in total.