condition mean min max 4 h after light 10.636949999999999 10.1577 11.1162 8 h after light 13.37305 12.9822 13.7639 12 h after light 17.9602 17.4005 18.5199 4 h after dark 22.70465 22.5417 22.8676 8 h after dark 22.316850000000002 22.2317 22.402 12 h after dark 18.58035 17.7858 19.3749