condition mean min max 4 h after light 723.3 723.3 723.3 8 h after light 754.55 750.4 758.7 12 h after light 987.8 782.9 1192.7 4 h after dark 976.55 730.1 1223.0 8 h after dark 939.7 801.2 1078.2 12 h after dark 940.55 874.8 1006.3