i got a 10,000,000 candle power light that i used shined down on it for a while, i am unsure how long, mabye 10sec to a min. it lit up the falls well, its diffrent so thats why i put that up there. i was going to drop it down into a river and take that photo but i couldnt find a bag and rope and a way to sink it while i had someone to help me, so... that one never panned out.