Halogen lightbulbs are to be phased off shop shelves from this weekend as part of an EU-wide effort to improve energy efficiency and cut carbon emissions.

From September 1, retailers will no longer be allowed to replace stocks of the lightbulbs, which use considerably more energy than alternatives such as LEDs or compact fluorescent (CFL) bulbs.

They also have a relatively short lifespan of around 2,000 hours – approximately two years when used for around three hours per day.

The move is the final stage of an EU directive that has progressively banned less efficient light sources starting with traditional incandescent light bulbs in 2009 and halogen GU10 spotlight bulbs in 2016.

Halogen product ban. (Philips) Halogen product ban (Philips)

The last phase bans non-directional halogen bulbs, including standard pear or candle shaped lamps.

Halogen bulbs have stayed on the market until now because manufacturers argued that LEDs were not yet a viable replacement due to higher upfront costs, particularly for the brighter 60W to 100W-equivalent bulbs.

Some specialist bulbs such as those used in some ovens and cooker hoods are exempt from the ban because LED or other alternatives are not available or viable.

A government study found that UK homes have an average of 34 lights, with 10 of them (31%) being halogen.

The Energy Saving Trust estimates that the typical halogen uses £11 of electricity a year while a replacement LED would only cost around £2 to use, and a halogen is likely to last for 2,000 hours compared with an LED’s 25,000 hours.

Stewart Muir, of the Energy Saving Trust, said: “Halogen bulbs are now quite an old technology. They were first patented for commercial use in 1959, so they’ve been showing their age for a while – mostly by inflating your energy bill.

“LED bulbs’ running costs are a fraction of halogens’ and they last a lot longer too, so making the move to the newer technology is an easy decision even before the ban comes into force.”

Greenpeace UK chief scientist Doug Parr said: “Recent heatwaves and floods have clearly illustrated the reality of climate change and it’s now more urgent than ever to cut unnecessary fossil fuel energy use.

“Shifting away from wasteful halogens and creating a new market for cleaner, more efficient LED lightbulbs, saving people money in the process, was a valuable role of the EU in driving up environmental standards. We would expect any post-Brexit regime to do the same in UK.”

A Department for Business, Energy and Industrial Strategy spokesman said: “Until we leave the EU, the UK Government continues to implement European regulations.

“LED lightbulbs tend to be more energy efficient than conventional lightbulbs, which means that when combined with other energy efficiency measures, households will save around £100 on their annual energy bills from 2020.”

Steve Wrapson, head of product marketing at Signify UK & Ireland – the manufacturer of Philips LED, said: “The gradual ban on halogen bulbs demonstrates a Europe-wide commitment to energy saving and reducing our carbon footprint.

“Not only does this present an opportunity for households to benefit from reduced energy bills, it introduces consumers to the array of colour, quality and design options when switching to LED.”

Halogen lightbulbs are about to be relegated to history.

Here are the key facts about the ban.

What is the ban?

From September 1 non-directional halogen lamps, including standard pear or candle-shaped bulbs, will be phased out, after incandescent bulbs went in 2009 and halogen spotlight bulbs, or GU10s, went in 2016.

Why are halogen bulbs being banned?

A Philips LED lightbulb. (Philips) (Philips)

They are extremely inefficient in their use of electricity. Halogen lamps use around five times the amount of energy of LED lamps. The EU’s ban is part of its commitment to rein in CO2 emissions and reduce its carbon footprint.

Do I have to replace all my halogens now?

No. The advice is to replace halogens with LEDs as and when the old bulbs expire.

Will shops stop selling halogens on September 1?

No, they are allowed to continue selling halogens until they run out of existing stock but they are not allowed to order any more from September 1.

However consumers who consider bulk buying halogens before they disappear for good have been warned that they are simply throwing money away in energy costs in the long run.

Will the LEDs fit existing light sockets?

In most cases, yes – LEDs can easily slot into existing fittings. However, in a small number of cases there may be a problem if you have halogen lights fitted in your ceiling which are connected to transformers.

According to Signify, the manufacturer of Philips LED: “The low wattage equivalent LEDs sometimes mean some transformers cannot detect that the light is actually switched on and therefore lights can flicker. In this case it is worth seeking advice from your electrician.”

Which LEDs should I buy to replace my halogens?

Light bulb packaging tends to convert the old-style wattage into the “lumens” measure for LEDs.

For example, an 8.5w LED bulb is equivalent to a 75w incandescent bulb, while a 13.5w LED is equal to a 100w old-style bulb.

Wattage measures power or energy, while lumens measure light output.

What about Brexit?

Lighting manufacturers by and large support the ban and are unlikely to produce special bulbs for the UK market alone. And EU rules still apply until Brexit has happened.

A spokeswoman for Signify said: “As the UK is still governed by EU ruling and we are still within the EU at the time of the imposed ban we cannot ignore the new regulation.”