House owner Sally Kennett was shocked when she realised who was robbing the lights from her back garden in Purton, near Swindon.
"I watched in disbelief as I saw one of the squirrels run down the tree and across the garden with a bulb.
"They never went anywhere near the nut feeders, they only seemed interested in the lights," said Sally.
The family have since found some of the lights buried in the garden, but loads are still missing.
"Who knows what they've done with the rest of them? Maybe they've set up their own mobile disco," Sally added.