condition	mean	min	max
4 h after light	7.668566666666667	7.50678	7.79167
8 h after light	7.9179200000000005	7.6454	8.16255
12 h after light	8.07391	7.5433	8.390419999999999
4 h after dark	7.8290733333333336	7.283930000000001	8.31824
8 h after dark	7.6289299999999995	7.480910000000001	7.84934
12 h after dark	7.499586666666667	7.3071600000000005	7.685630000000001