condition mean min max 2 h after light 3.239555 2.41959 3.97956 6 h after light 3.302435 1.86055 4.18964 10 h after light 3.352071666666667 2.81015 3.98488 14 h after light 3.878363333333333 2.7015 4.78921 18 h after light 4.19991 3.6491 5.27983 2 h after dark 6.247963333333333 4.85218 7.65585