condition mean min max 4 h after light 1993.704774 1868.736374 2118.673174 8 h after light 2338.3788990000003 2308.210403 2368.547395 12 h after light 2813.8212865 2798.728479 2828.914094 4 h after dark 2238.539749 1902.962826 2574.116672 8 h after dark 2571.8137355 2339.155134 2804.472337 12 h after dark 2281.077911 2281.077911 2281.077911