condition	mean	min	max
4 h after light	6.6	6.6	6.6
8 h after light	17.5	9.3	25.7
12 h after light	19.3	7.9	30.7
4 h after dark	14.85	14.5	15.2
8 h after dark	18.95	3.6	34.3
12 h after dark	24.1	17.6	30.6