condition	mean	min	max
4 h after light	8.332356666666668	8.14423	8.5753
8 h after light	8.35011	8.25489	8.43443
12 h after light	8.495296666666666	8.252930000000001	8.62627
4 h after dark	8.085923333333334	8.081430000000001	8.094619999999999
8 h after dark	7.89107	7.71073	8.13405
12 h after dark	7.910803333333334	7.54329	8.20682