condition	mean	min	max
4 h after light	8.299773333333333	8.15139	8.460519999999999
8 h after light	8.10559	7.948810000000001	8.26605
12 h after light	8.134910000000001	7.917610000000001	8.30096
4 h after dark	8.274103333333334	7.9787300000000005	8.56178
8 h after dark	8.37866	8.0722	8.66318
12 h after dark	8.562373333333333	8.23292	8.80674