condition	mean	min	max
4 h after light	3.7	3.7	3.7
8 h after light	4.65	4.3	5.0
12 h after light	4.0	0.3	7.7
4 h after dark	16.35	1.7	31.0
8 h after dark	3.0	1.8	4.2
12 h after dark	6.25	5.7	6.8