It isn't rocket science.
But it is so easy and adds simple charm all year round.
Take a mason jar (I love me a mason jar.)
or spaghetti sauce jar,
or wine bottle.
Stuff in a pack of Christmas lights with the plug sticking out the top.
Plug it in.
Add wire or ribbon to the top to be fancy.
You can probably find everything you need right now and have your own little firefly lamp without spending a penny.