condition	mean	min	max
4 h after light	5.9	5.9	5.9
8 h after light	3.5	3.4	3.6
12 h after light	4.15	2.5	5.8
4 h after dark	7.4	4.4	10.4
8 h after dark	4.65	2.9	6.4
12 h after dark	6.0	4.5	7.5