Dimmers extend the life of an incandescent bulb because they decrease current flow through the bulb however they also reduce the light output. So yes, you could extend the life of say a 100 watt incandescent bulb which will cost you about $1 or less if you can find one. However, dimmers today run $10 to $20 or more. So is it worth spending $10 or $20 and having less light in your room to extend the life a $1 light bulb. It's not worth it to me.Dimming an incandescent bulb reduces the flow of current and greatly prolongs the life of the bulb. I very rarely replace bulbs and while I would pay less for electricity if I used CFLs or LEDs I am willing to pay a bit more for the luxury of the soft, pleasing effect of dimmed incandescent lighting. And based on what I've seen this effect is simply not available from the new bulbs.I think the basic sales appeal of dimmers was they provide a convenient way of lower the light level in a room, not saving money.That lowers the efficiency a lot, causing an even greater fraction of the energy to make heat instead of light. So you save on bulbs, but lose money overall because you're spending so much more on electricity.
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