condition	mean	min	max
4 h after light	2.1	2.1	2.1
8 h after light	5.9	5.4	6.4
12 h after light	7.6	7.4	7.8
4 h after dark	4.45	3.9	5.0
8 h after dark	3.0	2.9	3.1
12 h after dark	4.15	3.6	4.7