condition mean min max 0 h after light 0.2207635 0.0 0.441527 2 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 2 h after dark 0.0 0.0 0.0 4 h after dark 0.204554 0.0 0.409108 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0