condition	mean	min	max
4 h after light	6.464916666666666	6.234319999999999	6.7473399999999994
8 h after light	6.40123	6.295	6.52533
12 h after light	6.229196666666667	6.0740099999999995	6.43957
4 h after dark	6.398183333333333	6.333069999999999	6.464519999999999
8 h after dark	6.257203333333333	6.0591800000000005	6.51241
12 h after dark	6.10224	5.800730000000001	6.452369999999999