i have a plumeria tree that thrived outside all summer long in the nice hot minnesota summer. but now its approaching minnesota winter and plumeria is not cold tolerant. i've brought it inside, but the trouble is that i dont have any south facing windows. my attached garage is on that side of the house. i have a tortoise with a uv light and heat lamp, and while i cant put the pot in the tortoise cage, i could put it next to the cage. is a uv light going to be enough for the plumeria tree?