condition	mean	min	max
4 h after light	9.431793333333333	9.363480000000001	9.51645
8 h after light	8.683313333333333	8.57741	8.757019999999999
12 h after light	8.2226	8.13434	8.29125
4 h after dark	8.48384	8.40219	8.55142
8 h after dark	9.51676	9.35363	9.66974
12 h after dark	10.088453333333334	9.943480000000001	10.2185