condition	mean	min	max
4 h after light	3.4	3.4	3.4
8 h after light	2.65	2.0	3.3
12 h after light	2.55	1.6	3.5
4 h after dark	3.0	2.1	3.9
8 h after dark	5.8	4.6	7.0
12 h after dark	23.3	18.8	27.8