Do you need tail lights temporarily? Do you have a boat trailer which is regularly taken into the water? Then MobiLED's lighting sets are a perfect solution. You attach the lights by magnets fixed at the backside of the lamp.
Lighting sets are available in two versions: with cable or wireless. The wireless sets have a rechargeable battery in the lamps and work through a Bluetooth connection.
Make sure that you take a set with a cable that is sufficiently long.