condition	mean	min	max
4 h after light	4.9	4.9	4.9
8 h after light	7.25	4.2	10.3
12 h after light	13.7	9.6	17.8
4 h after dark	3.3	3.3	3.3
8 h after dark	10.75	7.8	13.7
12 h after dark	16.1	15.4	16.8