condition	mean	min	max
4 h after light	6.62961	6.41029	6.84893
8 h after light	6.30378	6.11405	6.49351
12 h after light	8.747935	8.31514	9.18073
4 h after dark	8.20684	7.96955	8.44413
8 h after dark	8.562755	8.38865	8.73686
12 h after dark	8.011565000000001	7.75164	8.27149