condition mean min max 4 h after light 3139.3 3139.3 3139.3 8 h after light 4006.6000000000004 3544.6 4468.6 12 h after light 3148.5 3044.4 3252.6 4 h after dark 2973.75 2411.3 3536.2 8 h after dark 3077.05 2949.1 3205.0 12 h after dark 2762.95 2488.5 3037.4