GU10 LED Bulb 4W 450lm Dimmable - Cool White 4000K

This GU10 LED spotlight draws 4W and puts out 450 lumens, which the pack rates as a replacement for a 40W halogen spot. The light is 4000K cool white, as printed on the pack: a clean white that sits between the yellow of a traditional halogen lamp and the blue cast of a daylight one. The beam is wide rather than tight, so the light spreads across a surface instead of pooling into a hard circle, and the lamp is dimmable. One lamp comes in the box.

GU10 is the twist and lock cap used in most recessed ceiling downlights, track heads and small display spots. If the lamp you are replacing has two stubby pins that turn a quarter turn into the holder, this is the right fitting for it. Cool white at 4000K suits the places where you want to see clearly: kitchen worktops, a utility room, a hallway, a home office, or a run of downlights over a work surface. In a bedroom or a sitting room, where a warmer 2700K or 3000K lamp usually reads better, keep this one for shelving, display niches and artwork rather than the main ceiling run.

Because it dims, check your dimmer before committing to a full set. Older rotary dimmers were built for halogen loads of 40W and upwards, and a handful of 4W lamps can sit below the minimum load, which shows up as flicker or a very short usable range on the slider; a modern trailing edge LED dimmer sorts it out. The energy rating is E, and the pack prints a 15,000 hour lifespan, described there as 15 years. Each box holds one lamp, and the minimum order is 12 units sold in multiples of 12, which covers a whole ceiling run with spares. Our wider range of LED bulbs also covers GU10, B15 and 2G11 fittings in warm white and cool white.

Will this fit the halogen spotlights I already have?

If your existing lamp has two short pins that push in and twist a quarter turn to lock, it is a GU10 and this will go straight into the same holder.

What does 4000K cool white actually look like in a room?

It is a clean, neutral white with no yellow warmth and no blue tint, the kind of light that makes work surfaces and colours easy to read accurately.

Which dimmer should I use with a 4W LED lamp?

A trailing edge dimmer rated for LED loads is the safe choice. Old halogen rotary dimmers often have a minimum load far above 4W and can cause flicker.

How bright is 450 lumens next to my old halogen spot?

The pack rates it as a 40W halogen replacement, so expect a similar useful brightness from a lamp drawing a tenth of the power.

Does the manufacturer state an IP rating?

No IP figure is given in the specification or printed on the pack, so we state none here rather than guessing at a number.

How many lamps do I receive, and how many must I order?

Each box contains a single lamp. The minimum order on this listing is 12 units, sold in multiples of 12, so you receive 12 lamps.