condition	mean	min	max
4 h after light	8.760426666666667	8.46413	9.020660000000001
8 h after light	8.74564	8.39064	8.94233
12 h after light	8.96262	8.79146	9.071769999999999
4 h after dark	8.888936666666666	8.54963	9.135639999999999
8 h after dark	8.883236666666667	8.47406	9.23906
12 h after dark	8.72789	8.279	8.97073