condition	mean	min	max
4 h after light	6.903216666666666	6.828689999999999	7.02786
8 h after light	6.911003333333333	6.7582	7.0273
12 h after light	7.07432	6.90505	7.298080000000001
4 h after dark	6.933196666666667	6.828460000000001	6.99373
8 h after dark	6.798723333333333	6.69877	6.906610000000001
12 h after dark	6.79148	6.59837	6.965139999999999