condition mean min max 4 h after light 5.298276666666666 5.28897 5.31209 8 h after light 5.267476666666667 5.14363 5.34326 12 h after light 5.24821 5.20432 5.30014 4 h after dark 5.37284 5.24635 5.460459999999999 8 h after dark 5.28922 5.19068 5.37381 12 h after dark 5.154446666666667 5.12475 5.184830000000001