condition	mean	min	max
4 h after light	2.8	2.8	2.8
8 h after light	6.0	4.0	8.0
12 h after light	6.95	4.4	9.5
4 h after dark	17.0	3.0	31.0
8 h after dark	4.25	2.5	6.0
12 h after dark	16.85	9.0	24.7