condition mean min max 4 h after light 3.15103 3.03807 3.26399 8 h after light 3.3708 2.8551 3.8865 12 h after light 2.476935 1.89562 3.05825 4 h after dark 5.23144 4.94189 5.52099 8 h after dark 9.817565 9.28183 10.3533 12 h after dark 6.9202200000000005 6.37147 7.46897