condition mean min max 4 h after light 4.178993333333334 4.15907 4.198180000000001 8 h after light 4.168423333333333 4.10572 4.2326 12 h after light 4.16482 4.03207 4.34002 4 h after dark 4.239063333333334 4.137580000000001 4.37263 8 h after dark 4.1803 4.05704 4.25988 12 h after dark 4.249873333333333 4.22585 4.26236