condition	mean	min	max
4 h after light	7.07374	6.962510000000001	7.26277
8 h after light	7.29581	6.974639999999999	7.647360000000001
12 h after light	7.558613333333334	7.2984800000000005	7.9710399999999995
4 h after dark	7.279006666666667	7.2532	7.31492
8 h after dark	7.221603333333333	7.13625	7.33098
12 h after dark	7.04908	6.8362	7.278969999999999