condition mean min max 4 h after light 9.368883 9.368883 9.368883 8 h after light 9.070467 8.956727 9.184207 12 h after light 9.3268925 9.244668 9.409117 4 h after dark 9.810538000000001 9.471812 10.149264 8 h after dark 9.711325500000001 9.368883 10.053768 12 h after dark 8.848617 8.848617 8.848617