condition	mean	min	max
4 h after light	6.3263	6.19686	6.4246099999999995
8 h after light	6.151283333333334	5.95219	6.3147
12 h after light	6.3746	6.05976	6.60835
4 h after dark	6.433703333333334	6.1123400000000006	6.6855199999999995
8 h after dark	6.3359700000000005	6.23698	6.4747900000000005
12 h after dark	6.33502	6.12516	6.4795