My indoor lighting experience.
They have been in for 2 weeks and still have leaves popping out; But that may be still from being outside. I am going to try to keep arboretum around 60*f at the coolest during the winter. We usually keep the house cool in the winter but the arboretum is surrounded by heated spaces except for the ceiling/roof. I will have the fish tanks in operation by year end so that will generate some more heat. This is a monster in the making.