condition	mean	min	max
4 h after light	7.25169	7.1513100000000005	7.34885
8 h after light	7.288496666666666	7.2453	7.368939999999999
12 h after light	7.229760000000001	7.11988	7.328530000000001
4 h after dark	7.2112	7.004	7.391380000000001
8 h after dark	7.220626666666667	7.08373	7.343139999999999
12 h after dark	7.185403333333333	7.073189999999999	7.332839999999999