condition	mean	min	max
4 h after light	1.4	1.4	1.4
8 h after light	8.0	2.3	13.7
12 h after light	2.8	2.4	3.2
4 h after dark	18.55	10.5	26.6
8 h after dark	8.05	4.6	11.5
12 h after dark	4.15	3.8	4.5