I came across this thread on Reef Central and it may be just what you are looking for:
http://www.reefcentral.com/forums/sh...5&pagenumber=1
It is a lgihting timer but you can control the intervals. Sounds like it might be what you need. Here is a link where you can get it:
http://www.progearwarehouse.com/Chauvet-SF-4005
I'm considering getting one, just trying to figure out the best/cheapest way to get it to canada.