condition	mean	min	max
4 h after light	3.9	3.9	3.9
8 h after light	2.05	1.4	2.7
12 h after light	2.85	2.5	3.2
4 h after dark	4.65	2.0	7.3
8 h after dark	2.45	2.4	2.5
12 h after dark	4.8	4.1	5.5