condition mean min max 4 h after light 4.089103333333333 3.9739999999999998 4.17101 8 h after light 4.098 4.04871 4.19158 12 h after light 4.068863333333334 3.9818800000000003 4.12934 4 h after dark 4.184993333333334 4.12445 4.2344 8 h after dark 4.161383333333333 4.11605 4.23088 12 h after dark 4.19381 4.11449 4.31643