condition	mean	min	max
4 h after light	5.9	5.9	5.9
8 h after light	13.65	3.8	23.5
12 h after light	15.65	6.0	25.3
4 h after dark	2.45	2.0	2.9
8 h after dark	16.0	4.1	27.9
12 h after dark	16.15	3.1	29.2