How do you snowboard in FL? Is that a new hobby? :lol: I like snowboarding, but would give it up in an instant for the nice warm weather of FL :lol:
Anyway back to reefing... I haven't had any problems with low-light corals and T-5s, but have had problems with low light corals and MHs. Don't know exactly why, but I think that t-5 light is sufficient, but less intense than MHs, so it isn't such a problem. Also, MHs may produce more UV light, which may irritate some corals, but I'll have to admit that that is a debatable topic.
MHs can help heat the tank some, but so can t-5s. I think Icecap has a fan on a temp sensor that turns on at a set temperature, something like that is great for the more varied climate states such as Ohio.