condition	mean	min	max
4 h after light	7.810033333333333	7.67656	7.9276
8 h after light	7.855043333333334	7.74218	7.9165600000000005
12 h after light	7.982356666666667	7.9446699999999995	8.036480000000001
4 h after dark	8.12594	7.9042	8.26557
8 h after dark	8.170333333333334	7.92828	8.3582
12 h after dark	8.108789999999999	7.6974	8.31885