The Mist King timer is the bomb!!! very easy to set it.....and forget it. It has 8 programable timers, each with the capability to be set for its own amount of time. Very nice. If you need more than 8 programmable sessions a day I'd then go to the Herpkeeper unit by Digital Aquatics. I've heard good things about that unit. I personally use Mist King, and Marty at Mist King is always ready to answer questions and help.
goto a harware store they usually have tons to pick from, i lke the outdoor noma ones they have 8 on offs and are basically waterproof which is a plus for me and can handle like 100w off output so they can run a whole bank of lights