condition	mean	min	max
4 h after light	6.810703333333333	6.69343	6.90044
8 h after light	6.85252	6.68849	6.991960000000001
12 h after light	6.759053333333334	6.489330000000001	6.97721
4 h after dark	6.87517	6.46436	7.13432
8 h after dark	6.76647	6.414680000000001	7.05236
12 h after dark	6.6566	6.58605	6.724080000000001