We didn't put lights on the tree this year, with Lisa instead decorating it with origami cranes. We put the cards we received this year around the tree in the family room.
Here's a better look at the cranes resting in the tree.
The family room is at the opposite end of the house from the living room where the fireplace is, and it doesn't get too warm there. We'll put the tree back outside soon, water it regularly, and see if it will last until next Christmas at least.