condition mean min max 4 h after light 11.69345 10.6287 12.7582 8 h after light 12.9549 11.9242 13.9856 12 h after light 12.307 11.6019 13.0121 4 h after dark 16.70095 15.7019 17.7 8 h after dark 12.4191 12.3425 12.4957 12 h after dark 11.58785 10.9502 12.2255