condition	mean	min	max
4 h after light	8.271753333333333	8.22541	8.34413
8 h after light	8.30949	8.23066	8.39516
12 h after light	8.44792	8.38877	8.52544
4 h after dark	8.57504	8.50977	8.62682
8 h after dark	8.508213333333334	8.4265	8.59453
12 h after dark	8.549816666666667	8.52773	8.59227