condition	mean	min	max
4 h after light	7.530986666666667	7.35915	7.7411
8 h after light	8.264656666666667	8.245510000000001	8.2908
12 h after light	8.01393	7.881460000000001	8.13928
4 h after dark	8.10959	7.982189999999999	8.31103
8 h after dark	7.889423333333333	7.80162	8.04921
12 h after dark	7.180079999999999	7.09823	7.25834