With or without light it is all depends on actual design of each Christmas doll decoration.

There are some Christmas doll decorations with light. Normally it is controlled by small battery. Like we have figure of Christmas LED plush Santa, Christmas LED plush Santa, plastic led color changing lights.

These Christmas doll decorations with led light is not so much different from other Christmas doll decorations that not with light. But it gives shiny bright to the Christmas.