condition	mean	min	max
4 h after light	3.9	3.9	3.9
8 h after light	8.7	2.9	14.5
12 h after light	4.45	3.6	5.3
4 h after dark	16.65	16.0	17.3
8 h after dark	3.55	3.3	3.8
12 h after dark	20.4	19.6	21.2