These vintage Christmas lights must have had a separate string of wiring that they plugged into. They date to the 1920s or early '30s and were on my mother's trees as a child. They're approximately two- to three-inches tall, or wide, in the case of the fish. There is one more, a red, white and blue dirigible, but it's drying right now. When I opened the box (not original) it was in three pieces. These lights are quite heavy glass, and it was easy to glue the pieces together. I'll scan it in a day or two and post. It's a pretty unique piece, as are all of these. Isn't the doll just a bit bizarre? I bet a tree covered in these lights was quite a sight to behold.