condition mean min max 4 h after light 7.199445 6.82283 7.57606 8 h after light 5.746015 5.30413 6.1879 12 h after light 5.693575 5.29618 6.09097 4 h after dark 8.617015 7.38767 9.84636 8 h after dark 6.44103 6.29706 6.585 12 h after dark 7.474399999999999 7.2185 7.7303