condition mean min max 4 h after light 876.8 876.8 876.8 8 h after light 1091.6 1059.7 1123.5 12 h after light 1261.35 1083.3 1439.4 4 h after dark 1145.5 506.8 1784.2 8 h after dark 845.1 773.1 917.1 12 h after dark 952.35 799.8 1104.9