condition	mean	min	max
4 h after light	1.8	1.8	1.8
8 h after light	9.5	9.2	9.8
12 h after light	7.35	1.0	13.7
4 h after dark	7.5	1.4	13.6
8 h after dark	2.5	1.8	3.2
12 h after dark	1.85	1.0	2.7