condition	mean	min	max
4 h after light	9.0	9.0	9.0
8 h after light	2.6	2.5	2.7
12 h after light	4.4	4.0	4.8
4 h after dark	10.0	9.7	10.3
8 h after dark	11.9	6.8	17.0
12 h after dark	2.45	1.0	3.9