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Meet your new light bulb

What types of energy saving bulb are available?

Compact Fluorescent Lamps (CFLs)

These are the most common type of energy saving light bulb. They now come in a huge variety of shapes and
sizes including candles, golf balls and spotlights. What’s more, CFL bulbs have been improved in recent
years so that they now give off a far better quality of light, with the same warmth as incandescent bulbs (just to
make sure, we asked the Energy Saving Trust to check all of our bulbs).

CFLs are available in a range of styles to suit your needs:

Bulbs you want to see...

You can get CFL bulbs with both screw and bayonet fittings, which look just like the classic bulb and produce the same warm white light.

...and bulbs you don’t.

Stick and Spiral bulbs are great value for money so they’re ideal when the light bulb is hidden from view.

Bulbs for brightness...

Reflector bulbs are perfect if you’re looking to replace bulbs in spotlights and downlighters. And for downlighters you can use GU10 bulbs to replace halogen bulbs.

...bulbs for cosiness...

Candle shaped bulbs are perfect for bedside tables or ornamental lamps. Golf ball shaped bulbs.

...and everything in between.

If you prefer to set the mood yourself, some CFL bulbs now work with dimmer switches too. They are available with either bayonet or screw fittings.


LEDs are incredibly energy efficient. Very low wattage LED lights are perfect for accent or mood lighting but you can also get lights bright enough for kitchen cabinets, to read by, and for general use.

There is an increasing variety of LED bulbs available:

Use them instead of halogen bulbs...

The LED GU10 bulb has an advantage over the CFL options as it’s the same height as a halogen bulb so it fits neatly into a standard light fitting.

...or even as an alternative to CFL bulbs

LED bulbs also come with either a bayonet cap or screw fitting

Fluorescent tubes

When most people think of fluorescent tubes they think of offices, garages and workshops. What they’re not often associated with is energy efficiency and cost savings. You can now get small fluorescent tubes that are ideal for lighting desks, cabinets and kitchen work surfaces.

Which light fittings can be used with energy saving light bulbs?

With so many energy saving light bulbs now available and so many people using them in their
homes, most light fittings work with the bulbs. In fact, many light fittings now come with
energy saving light bulbs.

Lumens vs wattages – the new language

Instead of Watts we’ll be talking Lumens. We buy light bulbs to produce light, so what we really want to know when buying them is how much light they’re going to give out. From the 1st September 2010, manufacturers will have to tell us how much light comes from each bulb we buy, measured in Lumens.

Lumens Traditional Light bulb (GLS, Incandescent) Halogen Light Bulb Energy Saving Light Bulb – CFL Energy Saving Light Bulb – LED
1200 Lumens 100 watts 70 watts 19–21 watts  
600–700 Lumens 60 watts 40 watts 11–13 watts  
350–450 Lumens 40 watts 28 watts 8–10 watts 7 watts
200–300 Lumens 25 watts 18 watts 5–7 watts