condition mean min max 4 h after light 1323.3799685 1120.482413 1526.277524 8 h after light 978.2645494999999 889.297042 1067.232057 12 h after light 1011.435066 937.847441 1085.022691 4 h after dark 965.0802025 948.30898 981.851425 8 h after dark 933.450902 920.938978 945.962826 12 h after dark 2171.654733 2171.654733 2171.654733