> Agreed. However, I expect that for this room (furthest from garage > where breaker panel is) that they would put in heavy-enough wire > so that these effects are minimized. My house was built in the later 70's and has the breaker box at the back of the *detached* garage. Therefore I have runs that are very long. Virtually anything that uses an appreciable amount of current (irons, hair dryers, etc) will cause small (but noticeable) effect on lights that are on the same circuit just as you described. Of course I have runs that must consume at least 200' of wire. I'm just thankful that it is copper wire. ;-) Interesting side note: Light bulbs near the service entrance burn out much (I really mean VERY MUCH) more often than bulbs at the far end. The bulbs at the far end are used more than the ones closest to the service entrance. I suppose the wire resistance limits the peak inrush current to the bulbs preventing them from burning out as often. michael brown -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.