Skip the drill, just go to Save-on-crafts.com and get a package of Fairy Berries. They're a riot and come in lots of colors. I buy the white. Warning, they're LED and are very bright so you may need to pack each cube with clear Easter basket grass if you need a softer light. But they're the size of a large marble, are round, you open them up and pull the plastic tab to activate them then screw the top back on and you have a light source that will last 6 to 8 hours at least. They're fun to place under fabric on a cake table. Oh and they very slowly go on and off ..............very slowly.