condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.0 0.0 0.0 9 h after light 0.0098849 0.0 0.0296547 12 h after light 0.0 0.0 0.0 3 h after dark 0.0 0.0 0.0 6 h after dark 0.034006 0.0 0.102018 9 h after dark 0.0 0.0 0.0 12 h after dark 0.0314951 0.0 0.0944853