No mirrors, mirrors are bad. They "eat" useable light...The flat white paint is fine. Sounds like the CFs will do ya some good bro. The temperature really isnt an issue as long as you have a small fan on them. The highest i would go is 85F. Any higher and you risk killing your plant if its strain isnt acclimated for that temperature. But usually that doesnt happen. Cannabis is highly adaptable to temperature and soil differences.

Like i said before, the temp. isnt your problem, its the type of lights you were using. The CFs will be a miracle for you bro. Make sure they are gettin circulated air tho. Stagment air can stunt growth and cause other issues you dont need. Its too easy to prevent aireation problems to worry about it. Keep a fan breezin by em, rather simple.

PS- Sorry for the delay, i went on vaca.