condition	mean	min	max
4 h after light	4.8	4.8	4.8
8 h after light	18.3	16.6	20.0
12 h after light	1.7	1.4	2.0
4 h after dark	12.5	4.8	20.2
8 h after dark	12.95	12.5	13.4
12 h after dark	12.45	1.5	23.4