An underwater light can up your fishing game for a number of species, from crappie to cats, snook to stripers. This DIY light uses LED technology so battery draw is minimal, meaning you won’t have to worry about your boat not starting—or you can fish all night on a small lawn mower battery. Take your night fishing to the next level for around $30, and a couple hours of your time. Make sure to check your local regs before using.