condition mean min max 4 h after light 2863.9 2863.9 2863.9 8 h after light 2819.25 2499.7 3138.8 12 h after light 2780.55 2540.9 3020.2 4 h after dark 3768.25 2643.2 4893.3 8 h after dark 4693.55 3822.6 5564.5 12 h after dark 5208.75 5091.5 5326.0