condition mean min max 4 h after light 1642.195174 1388.312137 1896.078211 8 h after light 1601.9191505 1159.924364 2043.913937 12 h after light 968.2809725 918.460549 1018.101396 4 h after dark 919.587017 699.409177 1139.764857 8 h after dark 1100.1642015 1017.839944 1182.488459 12 h after dark 1697.706727 1697.706727 1697.706727