condition	mean	min	max
4 h after light	14.7	14.7	14.7
8 h after light	15.1	8.5	21.7
12 h after light	35.9	7.9	63.9
4 h after dark	15.95	12.5	19.4
8 h after dark	30.05	19.5	40.6
12 h after dark	6.5	6.0	7.0