condition	mean	min	max
4 h after light	3.0	3.0	3.0
8 h after light	5.1	4.5	5.7
12 h after light	15.6	3.5	27.7
4 h after dark	12.15	5.0	19.3
8 h after dark	6.6	6.4	6.8
12 h after dark	4.25	3.7	4.8