condition mean min max 4 h after light 10.55902 9.55234 11.5657 8 h after light 12.9304 12.2954 13.5654 12 h after light 18.94735 18.8534 19.0413 4 h after dark 22.531100000000002 21.7028 23.3594 8 h after dark 18.861800000000002 17.9067 19.8169 12 h after dark 14.2436 13.6925 14.7947