condition	mean	min	max
4 h after light	7.246906666666667	6.8196699999999995	7.52999
8 h after light	7.2797600000000005	7.0080800000000005	7.48457
12 h after light	7.8320300000000005	7.61716	8.01571
4 h after dark	7.5860666666666665	7.41109	7.71173
8 h after dark	7.710576666666667	7.3716800000000005	8.01024
12 h after dark	7.758543333333333	7.606669999999999	7.9389199999999995