condition	mean	min	max
4 h after light	8.512113333333334	8.388810000000001	8.59282
8 h after light	8.463373333333333	8.35652	8.56333
12 h after light	8.548086666666666	8.47483	8.68668
4 h after dark	8.66749	8.57283	8.732280000000001
8 h after dark	8.63163	8.43661	8.75723
12 h after dark	8.784283333333333	8.74515	8.832419999999999