condition	mean	min	max
4 h after light	1.6	1.6	1.6
8 h after light	30.3	22.5	38.1
12 h after light	2.85	2.7	3.0
4 h after dark	12.75	12.2	13.3
8 h after dark	21.55	17.8	25.3
12 h after dark	4.5	3.7	5.3