condition mean min max 4 h after light 11.823 11.2245 12.4215 8 h after light 12.357949999999999 12.0542 12.6617 12 h after light 14.998999999999999 14.6044 15.3936 4 h after dark 22.5248 21.9185 23.1311 8 h after dark 20.6812 20.2897 21.0727 12 h after dark 16.9018 16.822 16.9816