condition	mean	min	max
4 h after light	11.5	11.5	11.5
8 h after light	4.5	2.3	6.7
12 h after light	24.1	20.5	27.7
4 h after dark	2.6	1.8	3.4
8 h after dark	7.0	1.1	12.9
12 h after dark	14.0	6.8	21.2