condition mean min max 4 h after light 3100.1 3100.1 3100.1 8 h after light 3161.55 3064.0 3259.1 12 h after light 3382.05 3363.3 3400.8 4 h after dark 3007.45 2911.4 3103.5 8 h after dark 3033.8 3025.6 3042.0 12 h after dark 3020.3 2808.9 3231.7