condition mean min max 0 h after light 9.779164999999999 9.01153 10.5468 4 h after light 8.769535 8.72918 8.80989 8 h after light 6.4885850000000005 6.23145 6.74572 4 h after dark 7.587 7.46418 7.70982 8 h after dark 8.005690000000001 7.59074 8.42064 12 h after dark 8.850905 8.28268 9.41913