condition	mean	min	max
4 h after light	7.971526666666667	7.8456600000000005	8.05214
8 h after light	7.990220000000001	7.92497	8.09223
12 h after light	7.9756833333333335	7.9269300000000005	8.06183
4 h after dark	7.635656666666667	7.496410000000001	7.780239999999999
8 h after dark	7.6110299999999995	7.504519999999999	7.7012
12 h after dark	7.494893333333334	7.4698	7.536810000000001