I try to maintain my greenhouses at a minimum of 60F but the solarium is kept a bit warmer @ 64F (while we sleep) and 66F otherwise (it is a living space, so has to be comfortable). But they all surely do get plenty of light. The solarium has no supplemental lighting, at least none that would benefit plant-growing. The two greenhouse do get supplemental light (very strong T-5HO lighting) from 3:00 until 9:00 PM. They get shade from trees and from the house in the afternoon/evening.
