condition mean min max 4 h after light 2762.4 2762.4 2762.4 8 h after light 2508.25 2456.5 2560.0 12 h after light 1665.5 1103.6 2227.4 4 h after dark 634.3 371.5 897.1 8 h after dark 757.75 526.2 989.3 12 h after dark 1041.5 938.7 1144.3