condition mean min max 4 h after light 1.94412 1.33867 2.45794 8 h after light 1.7201403333333334 0.605871 2.40383 12 h after light 1.500315 0.761495 2.32748 4 h after dark 2.236056666666667 1.03123 3.03586 8 h after dark 2.38623 2.28992 2.56375 12 h after dark 2.76226 1.88517 3.67762