Frequently Asked Questions
Last updated 14 March 2009
Q. Why use them?
A. Compact fluorescent light bulbs (CFLs) use 80% less electricity, save you about £3 a year each, and last up to 12 times longer than old fashioned tungsten bulbs.
Q. What are they?
A. Think of them as compact versions of the striplights in work places since the 1950s.
Q. Have they improved? A. Use the service your municipal tip provides for the safe disposal of fluorescent tubes. Q. What should I do if I smash one? Q. Where can I find out more?
A. You can now get all shapes and sizes, fittings and levels of brightness, including 150W equivalent and dimmable options. A recent blind test of 761 shoppers, found that 64% preferred the light from them.
Q. Is it better to leave them running?
A. No, switching them on uses the equivalent electricity as leaving them on for a few minutes. Most now light instantaneously.
Q. How should I dispose of them?
Q. Is mercury an issue?
A. Ironically, installing CFLs ought to help reduce the need for coal-fired electricity production - a major cause of global mercury emissions. CFLs contain mercury - about 5mg. Locked into its tube, this is harmless.
A. Ventilate the room for 15 minutes. Put on your rubber gloves, brush the bits into a bag, seal it and drop it at the tip next time you go.
Q. Are tungsten bulbs banned?
A. No. Manufacturers have agreed to withdraw them for sale, starting with 100W in 2009, 60W in 2010 and 40W in 2011.
A. Contact the Energy Saving Trust on 0800 512012.
Q. I've heard that low-energy fluorescent bulbs shouldn't be switched on and off frequently because they use a lot of energy when they are first switched on?
A. In the past, fluorescent tubes used capacitors and inductors to create a high voltage when starting up. Modern fluorescent lightbulbs use an electronic ballast which does not have the inrush of current so there is no problem in switching them on and off. For energy saving, it is certainly better to turn off a light when leaving a room for more than 10-15 minutes.
Q. Doesn't it take ages for low-energy bulbs to reach their maximum brightness?
A. Modern low-energy bulbs are much quicker in reaching their maximum brightness than the early type of bulb, it now only takes a very short while.
Q. Aren't low-energy bulbs much less bright than normal bulbs?
A. Modern low-energy bulbs are much brighter than they were a few years ago. There are daylight blubs available which are excellent for desk lights and for close work.
Q. Aren't low-energy bulbs very expensive?
A. Low-energy bulbs are much cheaper than they used to be - they also last much, much longer than conventional bulbs. Big stores like Tesco, Lidl and Ikea are seeling bulbs for as little as 99p. The initial cost of even a £5 low-energy bulb is offset after 900 hours of use. The bulb will typically last about 8,000 hours so the savings over its lifetime could reach £35.
Q. Aren't low-energy bulbs are much too big for lights such as table lamps and wall fittings?
A. There is now a huge range of low-energy bulbs in bayonet, small bayonet, screw, small screw fittings. There are small golfballs, bulbs that look just like traditional bulbs, GU10 spotlights, candles, look at the list available in the low-energy lightbulb library.
Q. Can low-energy bulbs be used with dimmer switches?
A. Not generally, but there is a dimmable lightbulb available (bulb 117/117a) which can be dimmed in 3 stages to 3 different light levels so might suit some situations.
Q. Can low-energy bulbs be used in sensor lights?
A. Yes, there is a sensor lightbulb (bulb 224).
Q. Where can I recycle lightbulbs?
A. You can take them direct to Dean Tip Recycling Centre or to Bannor Electricial, Chipping Norton. You can also bring them along to a Charlbury Bring & Take event (March and October) and put them in the box provided.
Q. Are lightbulbs cheaper on the internet?
A. Bulbs 100-118 are available on the internet from Efficient Lighting . The Phillips Softone (bulbs 28-33) can be puchased on a Government website (http://www.lamps2udirect.com).
Q. Each lightshade has a limit on the maximum wattage of bulb to be used in it, can I use a low-energy lightbulb with a higher wattage equivalent?
A. Yes, you can use a higher equivalent wattage because not as much heat is generated (i.e. wasted) by the bulb.
Q. Can I attach a spring clip lampshade to a low-energy lightbulb?
A. Yes, you can on bulbs that have a rounded profile such as the Philips Softone (bulbs 28-33).
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