I have AK 48 and OG kush seeds hopefully enroute. I guess the AK will grow higher. As far as heat, fall is coming so should not be a problem I hope. It is very insulated so it is more stable on temperature. I think with the outside air coming in and the heat of lamp, it should be be a decent balance. I guess I need low/wide planting pots to get more growing room. I figure approx 40" for plant height max. I need to figure how long to run MH light for veg before flowering. I am thinking 6 weeks possibly.