condition	mean	min	max
4 h after light	8.494426666666666	8.41491	8.554889999999999
8 h after light	8.538913333333333	8.337760000000001	8.700460000000001
12 h after light	8.597126666666666	8.37505	8.74927
4 h after dark	9.06739	8.9355	9.30892
8 h after dark	9.17371	9.00802	9.3403
12 h after dark	9.242206666666666	8.97649	9.476360000000001