condition	mean	min	max
4 h after light	4.6	4.6	4.6
8 h after light	3.65	3.5	3.8
12 h after light	5.1	2.1	8.1
4 h after dark	4.5	1.6	7.4
8 h after dark	23.7	20.9	26.5
12 h after dark	6.0	5.4	6.6