condition mean min max 4 h after light 2.773275 2.74797 2.79858 8 h after light 2.41883 2.24379 2.59387 12 h after light 2.4942349999999998 2.21925 2.76922 4 h after dark 4.261089999999999 3.55525 4.96693 8 h after dark 2.95606 2.95557 2.95655 12 h after dark 3.188005 3.14188 3.23413