condition mean min max 4 h after light 901.7 901.7 901.7 8 h after light 962.35 865.8 1058.9 12 h after light 933.7 903.8 963.6 4 h after dark 1057.4 869.3 1245.5 8 h after dark 1186.6 1154.2 1219.0 12 h after dark 1132.7 1093.5 1171.9