condition	mean	min	max
4 h after light	6.6	6.6	6.6
8 h after light	17.35	17.0	17.7
12 h after light	12.6	7.0	18.2
4 h after dark	12.05	6.0	18.1
8 h after dark	4.65	3.6	5.7
12 h after dark	5.35	2.3	8.4