condition	mean	min	max
4 h after light	3.5	3.5	3.5
8 h after light	2.55	2.5	2.6
12 h after light	1.65	1.5	1.8
4 h after dark	7.1	1.5	12.7
8 h after dark	2.2	1.6	2.8
12 h after dark	3.5	2.0	5.0