condition	mean	min	max
4 h after light	37.5	37.5	37.5
8 h after light	19.3	6.0	32.6
12 h after light	15.3	9.3	21.3
4 h after dark	15.85	3.8	27.9
8 h after dark	11.7	5.2	18.2
12 h after dark	17.8	4.7	30.9