Some of the night trail driving I do involves deep water hole crossings.. I've blown a couple of sets of lights by failing to turn them off before the crossing, hot lens and cold water causes cracks. I've been contemplating installing lights up high so I can use them with the other ones off.. I'd use some sort of flood or wide type illumination.. Imagine this sort of crossing in the dark with no lights..
YouTube - Lukes Lagoon
YouTube - Lukes Lagoon