condition	mean	min	max
4 h after light	6.9864999999999995	6.707089999999999	7.44393
8 h after light	7.52756	7.38617	7.76928
12 h after light	7.721743333333333	7.4288300000000005	8.106760000000001
4 h after dark	7.662793333333333	7.5323199999999995	7.876639999999999
8 h after dark	7.579813333333334	7.44342	7.795610000000001
12 h after dark	7.27923	7.19756	7.3801