condition	mean	min	max
4 h after light	3.9	3.9	3.9
8 h after light	11.45	6.6	16.3
12 h after light	13.0	3.6	22.4
4 h after dark	10.5	4.7	16.3
8 h after dark	14.05	7.8	20.3
12 h after dark	9.4	7.2	11.6