condition	mean	min	max
0 h after light	12.7375	10.7	14.775
4 h after light	10.04175	9.7239	10.3596
8 h after light	8.448225	7.35946	9.53699
4 h after dark	18.98005	14.9585	23.0016
8 h after dark	19.25965	18.8928	19.6265
12 h after dark	12.54475	10.4931	14.5964