The icecap dimmer unit is called "Icecast" I think, or something like that. I don't know if they're still made. I haven't heard people speak of them in quite some time.
http://www.premiumaquatics.com/thest...s/ICECAST.html
Mak, not too sure but I think the X10's were being used for automating varying on/off times. For example, a lunar cycle that doesn't so much have varying intensity but "moonrise/mooset" times roughly approximately the lunar cycle every 14 days or whatever. Or maybe it was dimming, but then probably just using a standard incandescent then maybe. .. (?)