condition	mean	min	max
4 h after light	17.1	17.1	17.1
8 h after light	4.8	3.5	6.1
12 h after light	3.8	3.3	4.3
4 h after dark	22.2	6.0	38.4
8 h after dark	11.0	4.0	18.0
12 h after dark	17.6	4.9	30.3