Once I get my vented hood hooked up. I'll lower my light to about 1 1/2 feet.Maybe 1 foot,we'll see. My temps go up to about 95 for about an hour or two.Most of the day it's around 80 but for a few hot hours it goes up.
My plants are loving it. And it seems they like a little heat. It makes them grow faster. But I also have some CO2 flowing in there. So with enough co2 and nutes the heat just speeds things up.