condition	mean	min	max
0 h after light	9.08582	9.01757	9.15407
4 h after light	4.393865	4.27502	4.51271
8 h after light	5.54037	4.8921	6.18864
4 h after dark	7.321925	5.91872	8.72513
8 h after dark	8.076605	7.13737	9.01584
12 h after dark	7.95003	7.82482	8.07524