condition mean min max 2 h after light 2.485475 1.26875 3.86944 6 h after light 4.027806666666667 2.06555 6.66018 10 h after light 3.4080000000000004 2.54049 5.20708 14 h after light 2.75027 1.76297 4.28005 18 h after light 3.0417533333333333 1.67192 4.10001 2 h after dark 3.399925 1.48259 5.03191