Before you use the x-10 timers Check to see who else is using x-10 on you phase of power. Remember your power is also fed to many houses. Also you will need to put a filter on the incoming line, and other places. Hid and florsents, the refridge, motors, and any thing with a cap, will trip the x-10 signal. Us a relay74 on cheep computer and always have control They range between 29-70 bucks. I have a 70 buck unit that is done right. I also use the internal relay cards. But only have 20 + years of using them and love it.
You can use the x-10 to look like Lego blocks