condition mean min max 4 h after light 2860.0 2860.0 2860.0 8 h after light 2797.0 2434.2 3159.8 12 h after light 2701.25 2570.7 2831.8 4 h after dark 2407.25 2335.8 2478.7 8 h after dark 2508.55 2408.1 2609.0 12 h after dark 2289.95 2284.0 2295.9