condition mean min max 4 h after light 11.415809 9.918354 12.913264 8 h after light 13.2822395 13.117285 13.447194 12 h after light 12.794968 11.70153 13.888406 4 h after dark 10.8745895 10.526585 11.222594 8 h after dark 9.6829845 9.661758 9.704211 12 h after dark 8.433495 8.433495 8.433495