condition	mean	min	max
4 h after light	7.92617	7.67133	8.05635
8 h after light	7.60325	7.50409	7.6864300000000005
12 h after light	7.389396666666666	7.15032	7.674239999999999
4 h after dark	6.90579	6.8928899999999995	6.91277
8 h after dark	6.946563333333333	6.746989999999999	7.2878300000000005
12 h after dark	7.04009	6.75604	7.22567