condition	mean	min	max
4 h after light	0.8	0.8	0.8
8 h after light	4.5	0.6	8.4
12 h after light	33.1	29.2	37.0
4 h after dark	12.45	9.7	15.2
8 h after dark	17.15	12.8	21.5
12 h after dark	7.0	1.7	12.3