Berkley's Submersible Fish Lamp works on a 12 volt power source. Just connect the included clamps to a convenient 12V source and lower the light into the water to draw fish.
WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DHEP) and lead, which are known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov