I believe due to the amount of energy a light bulb uses when first turned on it is worth keeping it on for a length of time if you are going to need light in that area intermittently.
Is this true?
2007-05-19 01:36:21 · 9 answers · asked by happytaffy 4 in Science & Mathematics ➔ Other - Science
No. All electric light sources burn more power in a second or two than they do in starting up, except for full sized fluorescent tubes which use more to get started. But even they burn more power in half a minute than they need to get started. So you do not save start-up power by leaving the lights on.
2007-05-19 03:06:41 · answer #1 · answered by Anonymous · 0⤊ 0⤋
It depends on how intermittently...If you use that area 3 times a day only, then it would be pretty stupid to leave it open the whole day, whether it is energy-saving or not. If you need it everytime you read, for example, and you read a whole lot, then leaving it open is a viable option. It really is a matter of situation. But it is true that energy-saving bulbs use up more electricity in starting up than conventional incandescent bulbs.
2007-05-19 09:07:47 · answer #2 · answered by Kazukii 2 · 0⤊ 0⤋
Any light bulb will use up its rated watts while on despite possible surges during start-up. Most of the energy produces heat rather than light. The life of some bulbs can be extended by not turning them on and off too frequently, especially fluorescent bulbs. Even incandescent bulbs draw more current when cold than when hot (raising resistance) and a bulb with a weak spot on its filament (from boiling away tungsten) may draw too much local current and pop on start-up. Generally use the least light needed (using a dimmer on incandescent bulbs only) and shut them off when light will not be needed within a reasonable time. Night lights and some outside lights might be needed for safety.
2007-05-19 09:43:11 · answer #3 · answered by Kes 7 · 0⤊ 0⤋
The tungsten filament of an incandescent light bulb has a resistance that is close to zero when it is cold, when the switch is closed a tremendous surge of electricity takes place in the circuit until the temperature of the filament rises to the point where where the filament glows and emits light. This happens in a very short period of time and the electricity consumption is not greatly affected. Fluorescent lights use much power to the ballasts and it is best to leave them on if a lot of intermittent light is needed.
2007-05-20 19:21:58 · answer #4 · answered by johnandeileen2000 7 · 0⤊ 0⤋
I do it because we are trying to live on social security and that is difficult. Do not be concerned about the little things just turn off the lights when u can . Do not do it because of global warming ,it is not true. The hype on global warming has inflated all of our energies and we are paying possible 200% on gasoline of what we should that is why I call it a scam . Just an excuse to charge moor on as they are trying to save the world. Why not charge more because u want to punish the black ,it is all wrong.
2007-05-19 10:40:50 · answer #5 · answered by JOHNNIE B 7 · 1⤊ 0⤋
With an energy saving bulb yes but if it's an ordinary one then no...
2007-05-19 08:41:00 · answer #6 · answered by trish b 7 · 1⤊ 0⤋
Use batteries
2007-05-20 11:46:05 · answer #7 · answered by pixie007 4 · 0⤊ 0⤋
http://uk.answers.yahoo.com/question/index;_ylt=AtRTAbOJRPgESCaxtOJAXByxBwx.?qid=20070519053344AAm1xqc
2007-05-19 08:41:10 · answer #8 · answered by Anonymous · 1⤊ 0⤋
use candles
2007-05-19 08:39:48 · answer #9 · answered by Anonymous · 1⤊ 0⤋