condition mean min max 4 h after light 8110.0 8110.0 8110.0 8 h after light 5981.2 5497.7 6464.7 12 h after light 4461.1 3275.5 5646.7 4 h after dark 3423.65 3270.3 3577.0 8 h after dark 2889.35 2465.5 3313.2 12 h after dark 2699.75 2509.9 2889.6