condition	mean	min	max
4 h after light	7.2	7.2	7.2
8 h after light	6.7	6.4	7.0
12 h after light	5.300000000000001	4.9	5.7
4 h after dark	4.6	4.3	4.9
8 h after dark	6.0	4.4	7.6
12 h after dark	5.35	4.7	6.0