condition	mean	min	max
4 h after light	1.5	1.5	1.5
8 h after light	4.8	4.0	5.6
12 h after light	1.85	1.8	1.9
4 h after dark	5.1	4.5	5.7
8 h after dark	10.25	3.3	17.2
12 h after dark	16.8	5.7	27.9