condition	mean	min	max
4 h after light	3.7	3.7	3.7
8 h after light	1.95	1.5	2.4
12 h after light	3.15	2.8	3.5
4 h after dark	2.3	2.2	2.4
8 h after dark	2.2	2.0	2.4
12 h after dark	1.65	1.6	1.7