condition mean min max 0 h after light 10.23835 10.2171 10.2596 4 h after light 18.0947 13.7355 22.4539 8 h after light 10.480599999999999 10.2704 10.6908 4 h after dark 10.040165 7.65953 12.4208 8 h after dark 18.1741 17.7537 18.5945 12 h after dark 17.49565 16.7252 18.2661