condition	mean	min	max
4 h after light	1.2	1.2	1.2
8 h after light	2.7	2.2	3.2
12 h after light	3.2	2.9	3.5
4 h after dark	11.7	7.6	15.8
8 h after dark	4.4	2.8	6.0
12 h after dark	16.15	6.3	26.0