condition	mean	min	max
4 h after light	7.766626666666666	7.731889999999999	7.822010000000001
8 h after light	7.807329999999999	7.71325	7.960489999999999
12 h after light	7.950366666666667	7.84877	8.151810000000001
4 h after dark	7.7333099999999995	7.60682	7.81729
8 h after dark	7.69475	7.59687	7.87173
12 h after dark	7.702103333333333	7.58502	7.78525