I bought an arduino for dirt cheap off ebay and set it up as a full reef controller. If you pick one up i'd be able to help you get it going for lights no prob. lots of stuff on the web about doing it too.
check out:
http://www.arduino.cc/cgi-bin/yabb2/...num=1279784011
http://www.plantedtank.net/forums/li...fixture-w.html