condition	mean	min	max
4 h after light	6.310856666666667	6.17846	6.44267
8 h after light	6.269403333333334	6.18729	6.39038
12 h after light	6.208943333333333	6.01936	6.34264
4 h after dark	6.35018	6.232819999999999	6.5243199999999995
8 h after dark	6.56689	6.45699	6.72595
12 h after dark	6.32626	6.2687	6.38809