condition	mean	min	max
4 h after light	6.096606666666666	5.964119999999999	6.26195
8 h after light	6.232690000000001	6.17896	6.325830000000001
12 h after light	6.019156666666667	5.939830000000001	6.14458
4 h after dark	5.928433333333333	5.81083	6.02463
8 h after dark	5.885813333333333	5.69105	6.01999
12 h after dark	5.85132	5.41315	6.08571