condition	mean	min	max
4 h after light	2.9	2.9	2.9
8 h after light	4.3	3.9	4.7
12 h after light	18.85	16.2	21.5
4 h after dark	4.6	3.8	5.4
8 h after dark	11.05	3.5	18.6
12 h after dark	8.0	2.5	13.5