condition mean min max 0 h after light 29.7797 28.0811 31.4783 4 h after light 14.92315 14.823 15.0233 8 h after light 12.11225 11.0721 13.1524 4 h after dark 20.6925 20.1149 21.2701 8 h after dark 17.6404 17.2363 18.0445 12 h after dark 24.4602 20.6301 28.2903