condition mean min max 0 h after light 3.9736200000000004 3.87914 4.0681 4 h after light 3.567715 3.31273 3.8227 8 h after light 3.279515 3.19016 3.36887 4 h after dark 4.29772 3.65504 4.9404 8 h after dark 4.2210149999999995 4.05751 4.38452 12 h after dark 3.9027700000000003 3.86328 3.94226