GU10 LED Bulb 4.2W 350lm Non-Dimmable - Warm White 3000K, 2 Pack

A GU10 LED spotlight that draws 4.2W and puts out 350lm of warm white light at 3000K. The retail pack rates it against a 50W conventional spotlight, so it is the straight swap for the halogen reflectors fitted to most kitchen and hallway downlight kits. GU10 is the twist and lock cap: two short pins on the base that push into the holder and turn a quarter turn to lock. It runs directly on a 220-240V mains supply with no transformer involved, which is what separates GU10 from the 12V MR16 lamps that use two thin pins.

The 110 degree beam is wide for a spotlight, so light spreads rather than falling in a hard circle. That suits ceilings where the fittings sit a metre or so apart and you want the pools to overlap into even coverage: kitchen ceilings, hallways, landings and living room downlights. It works just as well in track spots and in angled fittings aimed at a wall or a run of shelving. At 3000K the light is warm without going amber, closer to the tone of an old halogen than the blue white of a 4000K or 6500K lamp.

This lamp is not dimmable, so it needs a plain on/off switch; fitted to a dimmer circuit it will flicker, buzz or refuse to strike. The rating is IP20, which means no protection against water, so keep it to dry indoor locations. The energy label puts it in class F at 4kWh per 1000 hours, and the pack prints a 10 year lamp life. Each box holds two bulbs, and the minimum order is 6 boxes, sold in multiples of 6, so plan for a whole ceiling rather than one failed spot. Alongside this listing we stock LED candle and golf bulbs with B15 caps in warm white, cool white and daylight.

Will this fit my existing GU10 downlights?

If the old bulb has two stubby pins with rounded tips and twists a quarter turn to release, it is a GU10 and this will fit. GU10 runs on mains voltage, so there is no transformer to check.

Can I use it on a dimmer switch?

No. The specification states it is not dimmable, so it needs a standard on/off switch. On a dimmer circuit expect flicker, buzzing or a lamp that will not light at all.

How bright is 350lm next to the halogen it replaces?

The pack rates these against a 50W conventional spotlight, so the light level should read as familiar rather than brighter. The saving is in the power drawn, which is 4.2W instead of 50W.

What does warm white 3000K look like in a room?

It is a warm, slightly creamy white, close to the tone of a halogen spot. Choose 4000K or 6500K instead if you want a crisper, cooler light for close work.

What does the 110 degree beam angle mean in practice?

It is a wide spread for a spotlight, so the light falls as a broad pool rather than a tight circle. That helps neighbouring ceiling spots blend into even coverage.

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

One unit of this listing is a box holding two bulbs. The minimum order is 6 boxes, sold in multiples of 6, which is twelve bulbs in total.