condition mean min max 4 h after light 5.756586666666666 5.66941 5.838769999999999 8 h after light 6.08884 5.92799 6.304869999999999 12 h after light 6.01735 5.90594 6.09499 4 h after dark 5.846723333333333 5.74967 5.918080000000001 8 h after dark 5.908836666666667 5.76931 6.1319 12 h after dark 5.579766666666667 5.4728900000000005 5.644019999999999