Your viv looks great!
I am also very new so not long ago I had the very same issues and concerns. If you can't go control and automatization crazy ($$$) for any reason, a surge protector will prevent voltage spikes that can get any heat emitter too hot or too cold...
http://www.monsterproducts.com/Core-...rge-Protectors
The next thing is to get some of the lowes dimmers... Connect all the dimmers to the power bar and all the CHE to the dimmers, play with the power of the dimmers to set temp as you like and bobs your uncle! try to set it at a warm day because viv temp will vary with room temp but it will still be higher. Someone gave me an advice: BP can handle much better cold temps than hot. so if you miss, better be on the cold side.
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