condition	mean	min	max
4 h after light	5.1	5.1	5.1
8 h after light	4.45	4.4	4.5
12 h after light	4.8	4.3	5.3
4 h after dark	13.55	3.1	24.0
8 h after dark	12.85	2.7	23.0
12 h after dark	4.05	2.8	5.3