condition	mean	min	max
4 h after light	7.725486666666667	7.6108	7.87312
8 h after light	7.757463333333334	7.585030000000001	7.9889600000000005
12 h after light	7.7982233333333335	7.7328399999999995	7.8766
4 h after dark	8.08524	7.964739999999999	8.22615
8 h after dark	8.15434	8.12909	8.17786
12 h after dark	8.211083333333333	8.16122	8.2933