condition mean min max 4 h after light 5.237410000000001 4.43058 6.04424 8 h after light 4.947565 4.89738 4.99775 12 h after light 6.6862449999999995 6.22282 7.14967 4 h after dark 9.76472 9.17023 10.1427 8 h after dark 9.48592 8.8831 9.90299 12 h after dark 7.0133133333333335 6.45132 7.77729