condition mean min max 0 h after light 3.51059 3.26878 3.7524 4 h after light 0.8981545 0.831179 0.96513 8 h after light 0.6514709999999999 0.415187 0.887755 4 h after dark 1.202693 0.482596 1.92279 8 h after dark 0.7679704999999999 0.401701 1.13424 12 h after dark 0.8899 0.55783 1.22197