condition	mean	min	max
4 h after light	7.74846	7.568219999999999	7.84063
8 h after light	7.74949	7.6968	7.79967
12 h after light	7.80036	7.535480000000001	7.9660899999999994
4 h after dark	8.177763333333333	8.08516	8.25047
8 h after dark	8.072203333333334	7.72655	8.445780000000001
12 h after dark	8.049133333333334	7.711869999999999	8.24652