condition	mean	min	max
4 h after light	2.9	2.9	2.9
8 h after light	5.9	4.3	7.5
12 h after light	13.6	10.2	17.0
4 h after dark	3.55	2.5	4.6
8 h after dark	3.3	3.2	3.4
12 h after dark	6.85	6.8	6.9