condition	mean	min	max
4 h after light	2.4	2.4	2.4
8 h after light	2.2	2.1	2.3
12 h after light	2.55	2.0	3.1
4 h after dark	2.75	2.0	3.5
8 h after dark	26.55	12.0	41.1
12 h after dark	3.0	2.7	3.3