condition mean min max 4 h after light 20.228153499999998 19.546644 20.909663 8 h after light 18.440351 17.334058 19.546644 12 h after light 19.9944485 15.108753 24.880144 4 h after dark 18.1768675 16.807091 19.546644 8 h after dark 18.431952000000003 16.858356 20.005548 12 h after dark 25.092539 25.092539 25.092539