condition	mean	min	max
4 h after light	2.1	2.1	2.1
8 h after light	2.3	2.3	2.3
12 h after light	2.4	2.3	2.5
4 h after dark	2.45	2.4	2.5
8 h after dark	2.95	2.0	3.9
12 h after dark	3.55	2.4	4.7