Comment Re:All Edison's fault (Score 1) 1080
sure it does, depending on the dimmer.
at half brightness the bulb draws about 75% of it's power, thus saving 25%.
This assumes you have a TRIAC based dimmer and not a (very) old rheostat based one.
This does not mean that the savings are proportional to light output, true. At minimal brightness the bulb is still drawing about 50% of full on power.
-nbr