condition	mean	min	max
4 h after light	2.3	2.3	2.3
8 h after light	16.9	7.3	26.5
12 h after light	17.0	15.8	18.2
4 h after dark	3.9	3.0	4.8
8 h after dark	9.0	3.9	14.1
12 h after dark	3.35	3.0	3.7