condition mean min max 4 h after light 3.966010666666667 3.861815 4.159619 8 h after light 2.7390863333333333 1.850396 3.201603 12 h after light 1.9688826666666668 1.77024 2.177795 16 h after light 3.8492669999999998 3.285199 4.497489 4 h after dark 3.213332 2.897411 3.722231 8 h after dark 2.0025773333333334 1.771567 2.219815