condition	mean	min	max
4 h after light	2.5	2.5	2.5
8 h after light	5.7	3.7	7.7
12 h after light	11.0	3.5	18.5
4 h after dark	5.75	4.8	6.7
8 h after dark	2.75	1.9	3.6
12 h after dark	19.0	3.7	34.3