I like to be set up 30 mins. before daylight. I use small green cap-lights and work well - I used to go in by moonlight - although I wear snakeboots, I've killed 4 foot rattlers and I don't want to chance them. My son and I did bust one turkey on a moonlit nite, flew out of the tree right above us on our way to set up. My son did all the calling, and 30 mins. after daylight, I saw him coming from the direction he flew - got him at 20 yds, one of the best birds so far. I have to believe it was the one we busted but never know for sure. He could see well enough to fly in the dark (moonlight). I'm NOT going to sit down on a rattlesnake - no turkey is worth that.