condition	mean	min	max
4 h after light	1.8	1.8	1.8
8 h after light	5.5	4.1	6.9
12 h after light	3.3	2.1	4.5
4 h after dark	3.55	2.8	4.3
8 h after dark	2.6	2.5	2.7
12 h after dark	4.0	3.0	5.0