condition	mean	min	max
4 h after light	8.136675	7.67099	8.60236
8 h after light	6.92043	6.89401	6.94685
12 h after light	10.135405	9.79171	10.4791
4 h after dark	14.4789	13.6645	15.2933
8 h after dark	15.581700000000001	15.531	15.6324
12 h after dark	13.23025	12.907	13.5535