condition mean min max 4 h after light 9670.045368 8810.689136 10529.4016 8 h after light 9239.512256499998 8976.770518 9502.253995 12 h after light 9839.859911 9702.939183 9976.780639 4 h after dark 9172.0714515 8495.924364 9848.218539 8 h after dark 7546.664139500001 6239.967774 8853.360505 12 h after dark 10812.645 10812.645 10812.645