condition	mean	min	max
4 h after light	7.823293333333334	7.737660000000001	7.890910000000001
8 h after light	7.85937	7.69918	8.06333
12 h after light	7.878416666666667	7.779610000000001	7.933910000000001
4 h after dark	7.76853	7.62965	7.857760000000001
8 h after dark	7.451356666666666	7.37794	7.5166
12 h after dark	7.50452	7.36821	7.6436399999999995