2007-02-20 08:34:20 · 12 answers · asked by Anonymous in Environment
It depends on how long you leave it off for, and what type they are.
"Incandescent lights (or bulbs) should be turned off whenever they are not needed."
"The cost effectiveness of turning fluorescent lights off to conserve energy is a bit more complicated. For most areas of the United States, a general rule-of-thumb for when to turn off a fluorescent light is if you leave a room for more than 15 minutes, it is probably more cost effective to turn the light off. "
2007-02-20 08:38:28 · answer #1 · answered by Yahzmin ♥♥ 4ever 7 · 2⤊ 0⤋
No. If the light is off, no energy is used. Many years ago, when fluorescent lights first came onto the market, they had large heavy ballasts that had to heat up before the light would come on. In those cases, it was felt there was a disadvantage to turning lights on and off.
Now, fluorescents come on right away. All of the old warming up and prolonged flickering is no longer necessary. So turn lights off when not using them.
2007-02-20 08:40:36 · answer #2 · answered by regerugged 7 · 1⤊ 0⤋
Not for a regular light bulb. Florescent bulbs pull a pretty large amount of current to initially light up but then draw a lot less.
So for a regular bulb, turn it off every time you leave the room. For a florescent, I don't have any definate numbers but I believe it's in the neighborhood of 5 minutes or so you should just leave it on.
2007-02-20 08:39:06 · answer #3 · answered by Mark B 5 · 0⤊ 0⤋
There is no particular wastage during the turn on or turn off procedure of a light bulb, unlike there is with automobiles doing "stop" and "go" where tremendous amounts of energy waste take place by excessive acceleration and by braking which turns motion into heat given off by the brakes.
2007-02-20 08:44:57 · answer #4 · answered by Evita Rodham Clinton 5 · 0⤊ 0⤋
No. When it is off, it uses no energy. However, the filament in the bulb is under more strain when it turns on and off. But that has nothing to do with how much energy is used.
2007-02-20 08:37:47 · answer #5 · answered by Blunt Honesty 7 · 0⤊ 0⤋
I volunteer at an power exploration center and we do quite a few experiments with electricity and bulbs on our college excursion software. i have considered the watt meters at the same time as a ordinary is switched on and on the incandescent there is not any spike in watt utilization, on the CFL there's a .02 watt utilization boost for the first 5 seconds, so the quantity of power used at the same time as the CFL is became on is too small for there to be a mark downs by leaving it on. i have considered on the GE sight that they advise leaving the ordinary on for quarter-hour to allow it to warmth up. I put in a CFL in my laundry room quite a few years in the past (too lengthy for me to bear in thoughts what year) and the ordinary is switched on and rancid quite a few circumstances an afternoon (it really is the in effortless words room and not using a window) and it hasn't burned out yet.
2016-12-04 10:35:07 · answer #6 · answered by Anonymous · 0⤊ 0⤋
on and off. think about it. When u switch the switch, it goes on and off. For a couple of seconds the light isn't on. Rather than it being on constantly! Get it? If u don't then comment.
2007-02-20 08:38:44 · answer #7 · answered by summahh07 1 · 0⤊ 1⤋
Leave it on only when you use it.
That funda is only for some electrical appliances which use more electricity when booting up like motors, fluorescent lights.
But it's judicios to shut them when not required for some time.
2007-02-20 08:39:01 · answer #8 · answered by Vikas 3 · 1⤊ 0⤋
I just saw this on mythbusters on the discovery channel. It deffinately saves energy if you shut thenm off any length of time.
2007-02-20 09:13:08 · answer #9 · answered by Anonymous · 0⤊ 0⤋
I just saw this on myth busters this weekend....It saves more money turning them off..The initial start up is very energy efficient..ss
2007-02-20 08:43:02 · answer #10 · answered by Anonymous · 0⤊ 0⤋