condition	mean	min	max
4 h after light	6.914743333333334	6.75099	6.996760000000001
8 h after light	6.806466666666667	6.63806	7.02198
12 h after light	7.033996666666667	6.9225699999999994	7.09285
4 h after dark	7.26823	7.14208	7.456639999999999
8 h after dark	7.3099300000000005	7.05686	7.634530000000001
12 h after dark	7.200073333333333	6.88501	7.460839999999999