a buddy showed this to me. We was fishing for crappie at night we get to the spot and he pulls out a light that has Styrofoam around it and floats it on the water out in front of us it takes about 5 mins. and we have millions of bait fish swimming around us then come the crappie and it was left and right the rest of the night. i have seen the lights at walmart and gandermountain about $10