ok we know that when u launch or collect the boat @ at boat ramp, most of the boat trailer would be in the salt water, with the back wheel of the car just near the edge of water. but how, i see all other boat trailers have their lights(break and indicator) fixed onto the trailer and submerge under water when launching/collecting the boat? are they waterproof? because they 100% don't look waterproof to me, i have mine lamps on a plastic bar/board, can i fix it onto the trailer? does it matter if the lights are dip into salt water? its electrical !!!! must stay clear off water right ?