Hey Pigeon, just a thought for you... If high temps is an issue for you even with LED, why dont you try running youre lights at night to compensate for high daytime heat?
that is such a good idea,, so good in fact that i am in the process of doing just that myself,, so here is the question then,, if one has plants already in the process of flowering,, in the middle of the process even, as in half way to harvest,, and has been lighting near exactly the 'opposite' to what you suggest i.t.c.,, how does one do the transition?? i debated to doing a 36 hr dark period,, then relighting as you suggest,, or does one transition slowly, half hour a day till it's done??
i picked transition slowly over time,, cheers,, great point