condition mean min max 4 h after light 6.904475 6.72556 7.08339 8 h after light 7.261175 7.20024 7.32211 12 h after light 9.268920000000001 8.78959 9.74825 4 h after dark 10.366165 9.50083 11.2315 8 h after dark 10.3428 10.1434 10.5422 12 h after dark 9.383205 9.08472 9.68169