condition	mean	min	max
4 h after light	1.8	1.8	1.8
8 h after light	4.05	3.9	4.2
12 h after light	3.45	3.4	3.5
4 h after dark	4.15	3.9	4.4
8 h after dark	3.3	3.2	3.4
12 h after dark	4.25	3.3	5.2