condition mean min max 4 h after light 7.31939 6.18164 8.45714 8 h after light 4.4494050000000005 4.3254 4.57341 12 h after light 4.543945 4.17054 4.91735 4 h after dark 6.436909999999999 5.2593 7.61452 8 h after dark 8.81306 8.20828 9.41784 12 h after dark 7.802975 7.13341 8.47254