I was in Home Depot and saw them by the checkout and started thinking about using them for ice fishing. They say they are waterproof. On the few times I have gotten on the ice before dawn I have shown a flashlight on small glow in the dark tubes and dropped them down, works for trout but I would like to be able to flash some metal too. Seems like they would do a better job of attracting fish than a little tube also. Anyone ever try them?