GU10 LED Bulb 3.4W 345lm Non-Dimmable - Cool White 4000K

This is a GU10 LED spotlight rated at 3.4W and giving 345lm, and the twist and lock GU10 cap is the one used in most UK recessed downlights and track spots. The light is 4000K cool white, a crisp neutral white that sits between the yellow cast of a traditional halogen and the blue white of a daylight lamp. The retail pack rates it as a replacement for a 50W halogen spot, prints a 25 year lifespan, and describes the 345lm as being delivered in a narrow cone rather than spread wide.

Cool white in a tight beam works well where you want to see clearly: over a kitchen worktop, above an island, along a hallway ceiling, or aimed at shelving, artwork and glass cabinets, where a smaller pool of light picks out one thing instead of washing a whole wall. If you are mixing this with lamps already in the same ceiling, check what they are first. A 4000K lamp sitting next to a 2700K one in the same run will look mismatched, so it is usually worth changing a full row at a time rather than one bulb as each fails.

This lamp is not dimmable, so give it a plain switched circuit. On a dimmer it may flicker, buzz or fail early, and a trailing edge dimmer will not cure that. The energy label gives class E, with consumption of 4kWh/1000h. Each box holds one bulb and the minimum order is 12, sold in multiples of 12, which suits fitting out a whole ceiling or keeping a few spares in the cupboard. If you would rather have a warmer light on the same cap, we also list a GU10 LED bulb in warm white 3000K.

Will this fit the downlights I already have?

If your existing bulb has two small pins that push in and twist a quarter turn to lock, it is a GU10 and this will fit. Pins that pull straight out are a different cap.

How does 345lm compare with the halogen spot I am replacing?

The pack rates it as a 50W halogen replacement, so in a typical downlight it should read as a similar amount of light while drawing 3.4W.

Can I put it on a dimmer switch?

No. It is non dimmable, so it needs a plain on and off circuit. On a dimmer you risk flicker, buzzing and a much shorter working life.

What does 4000K cool white actually look like?

It is a clean neutral white with no yellow warmth and no blue tint, the light most people associate with kitchens, utility spaces and working areas rather than lounges.

Why is the beam described as a narrow cone?

The output is concentrated rather than spread, so it throws a tighter pool of light. That suits accenting a worktop, a shelf or artwork more than lighting a whole room evenly.

How many bulbs do I receive, and what is the smallest order?

Each box contains one bulb. The minimum order on this listing is 12, sold in multiples of 12, so you receive twelve individually boxed bulbs.