Your basket is empty

Free Delivery Over £75
Payment Card Types

Everything You Should Know About GU10 LED Bulbs

A GU10 spotlight bulb is a very common type of light bulb that’s specially designed for use in GU10 spotlights and recessed downlights. The name comes from the pin pitch, with the two pins spaced 10mm apart. While GU10 bulbs have previously been available as halogens and compact fluorescent lights (CFLs), the phase out of these bulbs across Europe now means that the GU10 LED bulb is the most common remaining option.

The evolution of the GUI0 from halogen through to energy saving CFL through to LED began in 2006, when energy saving technology became available  through CFLs and was further accelerated in 2018 when halogen bulbs were banned and LED technology was well established. Today, the GU10 LED bulb is considered to be the best retrofit alternative, and is the easiest solution for anyone wanting to upgrade from their older, inefficient light bulbs.

Many of the world’s most renowned lighting brands now offer GU10 LEDs, including GE which played a major role in pioneering LED technology, and UK brand Megaman which offers highly advanced energy saving lighting options. Crompton, one of the oldest lighting firms in the world, and US-based lighting solutions company Sylvania also offer an extensive range of modern GU10 bulbs. Together, these brands offer GU10s that come in a wide selection of temperatures, colours, sizes, and aesthetic styles.

What’s the Difference Between a GU10 LED and a GU10 Halogen?

GU10 LEDs and GU10 halogen bulbs are both designed for use in spotlights and downlights. The primary difference is that one features an old, now prohibited halogen bulb, while the other uses advanced LED lighting technology.

This means GU10 LEDs use around five times less energy than their halogen counterparts. Halogens were banned in Europe in 2018 due to the high levels of CO2 emissions that were being created by the light bulbs' vast energy usage. GU10 LEDs were introduced as a way to minimise the carbon footprint of spotlights and downlights.

Replacing GU10 Light Bulbs

Today, GU10 LEDs are a very common, modern alternative to GU10 halogens, and in most cases GU10 LEDs are very easy to retrofit into halogen fittings. In some cases, there may be a need to pay special attention to the length of the bulb as some downlighters were fitted with an energy saving CFL version longer than the standard halogen GU10. However, in most cases GU10 LEDs can be swapped in quickly and easily without the need for additional electrical work.

For many, the most challenging aspect of replacing GU10s will be understanding how to work out which LED GU10 is right to replace CFLs or older halogens . Checking out an equivalent wattage table from halogen to LED GU10 can help. For example, a GU10 50W LED is not needed to replace a GU10 50W halogen. Instead, a 4.5W LED bulb produces a roughly similar light output. That’s because GU10 LEDs emit more lumens at a lower wattage. The brightest LED GU10 boasts an output of 575 lumens at just 6.2W. In comparison, it would take an 80W GU10 halogen to produce the same light output.

GU10 Sizes

In most cases, a 50mm diameter GU10 LED will be needed to replace older GU10 halogens. This is the standard size, and will typically fit most existing spotlight and downlight fittings. However, there are also 35mm diameter GU10s which are considered to be a highly specialist size, and mini GU10s with a smaller diameter which can fit into smaller diameter spotlight fittings. The length of a GU10 LED is often 53mm, although long barrel energy saving CFL replacements are also available in lengths up to around 75mm. 

How to Choose Temperature & Colour

An important consideration when switching to GU10 LEDs is to pick the right colour of GU10 for the right room. GU10s come in a range of different temperatures and colours.

For living rooms, hallways, landings, and bedrooms, a warm white colour (2700k - 3000k) is usually preferred as these bulbs give off a warming, slightly yellow, welcoming glow. 3500k GU10s give off more of a plain white colour. GU10 LED bulbs in cool white (4000k - 4500k) are ideal for kitchens and bathrooms as they offer a crisper, clearer colour that’s good for task work. For offices and commercial properties, GU10 LED bulbs in ‘daylight’ colour (6000k - 6500k) give off the most natural light. There are also super high CRI-rated GU10s that emit a very clear, very natural light. These are often used in art galleries.

Coloured bulbs are another option. UK brand Prolite has a huge selection of coloured GU10s, which are available in colours such as blue, orange, green, and magenta.

No matter which colour or temperature is chosen, dimming options are available. GU10 LED dimmable bulbs make it easy to adjust the lighting level in each room as needed. For GU10 LED bulbs, dimmable switches that are compatible with these bulbs work best as they prevent flickering and damage. The good news is these are very affordable.

LED GU10s are typically available in options ranging from 1.8W to 11W. A GU10 LED 5W bulb in cool white would be roughly the equivalent of a 50W halogen. And instead of needing a GU10 35W Halogen, a 3.1-4W warm white can be used as a 35W halogen alternative.

The video above shows the three most popular colours temeratures in action. Demonstrated using LED GU10s.

Benefits of Switching to GU10 LEDs

A question that many are asking right now is ‘is it time to switch from halogen GU10 lamps to LED GU10 lamps?’. And the answer is absolutely. There are many benefits to making the switch, including making big savings, and becoming more eco friendly.

In terms of saving money, GU10 LEDs not only last longer than halogens, but cost less to run, too. The average GU10 LED bulb is expected to work up to 50,000 hours, compared to just 1000 hours for a halogen alternative. And at the same time, the Energy Saving Trust estimates that GU10 LEDs cost just £2 per year to run, compared to £11 for halogens. Purchasing as bundle boxes rather than individual items can also keep costs down.

Switching to GU10 LEDs may also help to minimise risk, and create a safer environment, particularly for families with young children or animals. GU10 LED bulbs do not get hot, and keep a relatively low temperature no matter how long they’ve been on for. While they may be hot to the touch, they are unlikely to burn, and will not pose a fire risk.

The Future of GU10 Light Bulbs

Smart LED GU10s are next in the development of the GU10 bulb. Many brands are already developing these products, and widespread rollout of is right around the corner. By incorporating smart technology into GU10 LEDs, users will be able to operate their lighting through an app or connected device, and will even be able to control their lighting using voice commands. It is expected that smart GU10 bulbs will play a big role in increasing home security, with lights being able to be switched on, dimmed, and colour changed from anywhere, at any time, through remote operations. 

Created by Gary Baker on 2nd February, 2021


Gary Baker

Gary Baker

BLT Direct