Do Dimmer Switches Save Electricity
Posted on 2008-10-09
Is the same amount of electricity used regardless of the dimmer switch setting.
For example, a 100W lightbulb consumes a 100 watts of electricty per hour's use. If the dimmer switch is set midway and the light is dimmed, does it mean only 50 watts of electricity is used per hour?
Potentiometers come as linear and logorithmic. It would make sense to use linear pots in the manufacture of dimmer switches. Is the corrolation between the dimmer switching and the amount of electricity used a straight line graph?
The reason I ask is, by dimming lights, would it save on the use of electricity? A single 100W lightbulb can cost 15p over a 10-hour period (10h X 100W = 1KWh @ 15p/KW). That single lightbulb could add about £13.50 to an electricity bill per quarter alone!!