condition	mean	min	max
4 h after light	20.8	20.8	20.8
8 h after light	22.5	19.0	26.0
12 h after light	17.25	8.8	25.7
4 h after dark	22.1	6.0	38.2
8 h after dark	3.65	2.2	5.1
12 h after dark	3.9	3.3	4.5