condition	mean	min	max
4 h after light	8.558513333333332	8.40358	8.744069999999999
8 h after light	8.17172	7.9107	8.34097
12 h after light	8.44833	8.14353	8.62063
4 h after dark	8.682083333333333	8.502289999999999	8.78651
8 h after dark	8.421583333333333	7.98182	8.67504
12 h after dark	8.66232	8.38175	8.874189999999999