condition mean min max 4 h after light 814.2 814.2 814.2 8 h after light 880.3 838.7 921.9 12 h after light 984.45 915.6 1053.3 4 h after dark 1214.05 1134.8 1293.3 8 h after dark 1186.2 1169.7 1202.7 12 h after dark 1173.5 1095.6 1251.4