condition	mean	min	max
4 h after light	7.763853333333333	7.6528	7.914339999999999
8 h after light	7.671356666666667	7.58228	7.821910000000001
12 h after light	7.97569	7.78983	8.16661
4 h after dark	7.908996666666667	7.76422	8.076
8 h after dark	7.5914600000000005	7.36925	7.725910000000001
12 h after dark	7.70268	7.478089999999999	7.817710000000001