Christmas Tree does not Light.
I was playing my desert family in Oasis Springs and since it doesn't snow there because the gods of EA made it so I decided in the winter to take my sims to Granite Falls to have a little winter fest ...
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No its just a glitch in the game, because it treats the tree like a lamp but you can light it at your residents while singing Christmas songs. Not really a game breaker, just incompatible coding between packs.
