condition	mean	min	max
4 h after light	2.0	2.0	2.0
8 h after light	2.8	2.4	3.2
12 h after light	16.45	15.0	17.9
4 h after dark	4.85	4.5	5.2
8 h after dark	4.05	3.6	4.5
12 h after dark	4.85	3.5	6.2