condition mean min max 4 h after light 2168.8 2168.8 2168.8 8 h after light 2505.8 2505.3 2506.3 12 h after light 2270.4 2239.8 2301.0 4 h after dark 2737.05 2405.0 3069.1 8 h after dark 3079.85 2652.6 3507.1 12 h after dark 3152.7 3068.3 3237.1