Step 4: Two by two...
Shoot a few blasts of frosting paint into the jar. Do this outdoors. You may want to wear gloves as the paint will shoot back out of the jar from the pressure. One or two coats will do. You just want to obscure the jar lightly. Get fancy with stencils if you want.
Pair the lights up and see how they work in the jar.
I found the inverted jar works better from a visual standpoint.
Wrap the two candle bases with some kind of fabric to camouflage them. Pick a scrap of fabric to match the theme of the wedding party or to match the color decor.
Throw in a bit a nature. You can even cut out a leaf shape from construction paper.
Adjust the height and placement of the two fireflies.