condition	mean	min	max
4 h after light	7.8452	7.7618100000000005	7.99338
8 h after light	7.970386666666666	7.90707	8.0171
12 h after light	7.6985	7.62887	7.83696
4 h after dark	7.78113	7.740639999999999	7.82178
8 h after dark	7.7883466666666665	7.63738	7.90044
12 h after dark	7.87164	7.7685	8.07473