condition	mean	min	max
4 h after light	2.4	2.4	2.4
8 h after light	2.4	2.3	2.5
12 h after light	2.7	2.7	2.7
4 h after dark	6.15	4.0	8.3
8 h after dark	5.1	3.6	6.6
12 h after dark	2.45	1.7	3.2