condition	mean	min	max
4 h after light	2.7	2.7	2.7
8 h after light	36.8	34.9	38.7
12 h after light	18.8	17.0	20.6
4 h after dark	13.05	3.3	22.8
8 h after dark	4.5	4.4	4.6
12 h after dark	10.7	3.4	18.0