2007-03-04 04:51:23 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
They tested that on Mythbusters. Try their website. As I recall, the difference was so minimal, it really doesn't make any difference at all. Best to turn them off when you're not using them.
2007-03-04 04:54:49 · answer #1 · answered by GeminiVirgo1971 5 · 0⤊ 0⤋
Many portable household electric heaters are rated at 1, 2 or 3 KW (kilowatts). One kilowatt is equal to 1,000 watts. Ten 100 watt light bulbs would consume 1,000 watts or 1 KW of power and give off 1 KW worth of heat. In the winter, if you operate ten 100 watt bulbs in an apartment heated by electricity there would likely be no savings because the electric heaters must make up the difference. In the summer shutting off ten 100 watt light bulbs would reduce the load on your air conditioner by 1 KW worth of heat which shhould save power. When not in use shutting off an incandescent light bulb will extend its life (which is a savings). Also the life of a fluorescent light bulb can be extended by not shutting it off every time you leave a room. If you will be away perhaps an hour or two, shut it off.
2007-03-04 06:02:49 · answer #2 · answered by Kes 7 · 0⤊ 0⤋
Turn them off when not needed. Some time back there was concern over whether the starters on flourescent lights required more energy to turn the light on than just keeping them on. Basically not an issue anymore, and never an issue with incadescent lights.
2007-03-04 04:56:10 · answer #3 · answered by Isaac 4 · 0⤊ 0⤋
It saves more electricity when you turn it off when not needed.
2007-03-04 04:55:04 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Turn them off when not in use. When the lights are on, it consumes energy, and this is what is reflected in your electric bill.
2007-03-04 04:54:44 · answer #5 · answered by WC 7 · 0⤊ 0⤋
Mythbusters did this one. If I remember right they determined that it was best to turn them off. They used different types of bulbs and there wasn't a valuable difference.I looked up their web site and couldn't find anything that would help, but I do know they did it.
2007-03-04 05:06:36 · answer #6 · answered by donworybhapy 2 · 0⤊ 0⤋
Turn them off when not in use.
2007-03-04 07:34:35 · answer #7 · answered by JOHNNIE B 7 · 0⤊ 0⤋
light off = no electricity
light on = electricity
no light = no electricity
duhhh
2007-03-04 08:17:05 · answer #8 · answered by roar_ri1 1 · 0⤊ 0⤋