condition mean min max 4 h after light 3459.7 3459.7 3459.7 8 h after light 3415.8 2983.8 3847.8 12 h after light 3033.05 3007.3 3058.8 4 h after dark 3329.35 2877.6 3781.1 8 h after dark 3302.8 3265.1 3340.5 12 h after dark 3237.2 3062.0 3412.4