condition	mean	min	max
4 h after light	3.0	3.0	3.0
8 h after light	1.95	1.5	2.4
12 h after light	3.65	3.2	4.1
4 h after dark	2.7	2.7	2.7
8 h after dark	1.95	1.9	2.0
12 h after dark	3.25	2.8	3.7