How much energy does it take to turn on a light bulb?

Answer When you turn on a compact fluorescent light bulb, you're using about as much energy as it takes to run that same light bulb for five seconds. Compact fluorescent bulbs use about 80 percent less en... Read More »

Top Q&A For: How much energy does it take to turn on a light...

Is it energy efficient to turn off a fluorescent light bulb?

Is energy efficient to turn off fluorescent light bulbs, especially if you are leaving the room for more than five minutes. The power surge from turning them on is only equivalent to a few seconds ... Read More »

Is it okay to use a higher than recommended light bulb wattage if it is a CFL low energy bulb?

The maximum watts requirement has to do with heat. All bulbs give off heat. The higher the wattage, the more heat is created. Complying with the recommendation prevents fires.CFL bulbs are marked w... Read More »

Why is my energy saver (spiral) light bulb flickering even after the light is turned off?

Well, most of the time, when you hear about a CFL bulb flickering, it is happening when the light is turned on, and just not getting enough power to operate - such as when one is placed in a light ... Read More »

Can you safely use a 20watt energy saving electric light bulb in a light fitting rated for 75watt standard?

As others have implied without stating outright, the rating of the light fitting is down to the amount of heat it can safely disperse. Most of the energy a normal light bulb uses is wasted as heat ... Read More »