condition	mean	min	max
4 h after light	19.1	19.1	19.1
8 h after light	2.15	1.7	2.6
12 h after light	1.15	0.8	1.5
4 h after dark	3.2	1.6	4.8
8 h after dark	3.3	1.0	5.6
12 h after dark	2.55	1.9	3.2