condition	mean	min	max
4 h after light	1.8	1.8	1.8
8 h after light	1.8	1.6	2.0
12 h after light	17.75	2.8	32.7
4 h after dark	3.85	3.2	4.5
8 h after dark	2.4	1.0	3.8
12 h after dark	5.7	4.2	7.2