condition	mean	min	max
4 h after light	7.70217	7.2430699999999995	7.93422
8 h after light	7.75869	7.459389999999999	8.0184
12 h after light	7.629156666666667	7.0240100000000005	7.95056
4 h after dark	7.73873	7.206010000000001	8.07569
8 h after dark	7.61505	7.160889999999999	7.91078
12 h after dark	7.602883333333333	7.19469	7.8322899999999995