condition	mean	min	max
4 h after light	2.5	2.5	2.5
8 h after light	3.8	2.8	4.8
12 h after light	3.45	3.2	3.7
4 h after dark	3.35	1.0	5.7
8 h after dark	1.9	1.8	2.0
12 h after dark	2.75	2.1	3.4