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MR16 LED Bulbs

MR16 LED spotlight bulbs from Energizer, built on the GU5.3 cap with two push-in pins. Each draws 3.4W for around 345 lumens, standing in for a 35W halogen, and comes in warm white at 3000K or cool white at 4000K. The reflector shape throws a focused beam, so these suit recessed spotlights and accent fittings around the home. Both versions here are non-dimmable single bulbs.

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What an MR16 bulb is

MR16 is a compact reflector lamp built for spotlighting. The reflector behind the LED shapes the light into a defined beam rather than spreading it in all directions, which is what makes these bulbs suited to picking out a feature or lighting a work surface. They are a common replacement bulb for recessed and accent fittings.

The GU5.3 pin cap

These bulbs sit on the GU5.3 cap, which uses two push-in pins rather than a screw or bayonet. The pins press into the matching holder, so before ordering it is worth checking your fitting takes a GU5.3 base. Where it does, the bulb pushes straight home.

Warm white or cool white

Two colour temperatures are offered. Warm white at 3000K gives a softer, cosier light that suits living and relaxing spaces, while cool white at 4000K is crisper and more neutral, which works well in kitchens, bathrooms and task areas. Choosing between them is mostly about the mood you want in the room.

Focused beam for spotlights

Because the reflector concentrates the light, these bulbs are at their best in recessed spotlights and accent fittings where a directed beam matters. Pointed at a picture, a worktop or an architectural detail, the shaped beam keeps the light where you want it rather than letting it wash across the whole room.

Standing in for halogen

These LED bulbs are designed as a replacement for older MR16 halogen spotlights, dropping into the same GU5.3 holder. Moving to LED keeps the familiar beam and fitting while drawing far less power than the halogen lamps they replace.

Non-dimmable singles

Both versions here are non-dimmable and supplied as single bulbs, so they suit fittings on a standard switch rather than a dimmer. Order the quantity your fitting needs. Free UK delivery over £99, worldwide shipping.

Frequently Asked Questions

What fitting do these MR16 bulbs use?
They use the GU5.3 cap, the two-pin push-in base found on most low-voltage MR16 spotlights. Line the pins up with the holes in the fitting and push the bulb straight in. If your existing spotlight uses a different base, check the holder before ordering so the new bulb matches.

Can I dim these bulbs?
No. Both the 3000K warm white and 4000K cool white MR16 bulbs in this range are non-dimmable, so run them on a standard on/off switch rather than a dimmer. Putting a non-dimmable LED on a dimmer circuit can cause flicker or buzz and may shorten its life.

What is the difference between the 3000K and 4000K options?
3000K is a warm white with a soft, slightly golden tone that suits living spaces and relaxed settings. 4000K is a cool white that reads crisper and more neutral, which works well in kitchens, bathrooms and task areas. Both put out around 345 lumens from 3.4W.

What wattage do these replace?
Each bulb runs at 3.4W and gives roughly 345 lumens, which is comparable to a 35W halogen MR16. You get a similar level of light for a fraction of the power draw, so swapping older halogen spotlights for these LEDs cuts the running load on the circuit.

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