condition mean min max 4 h after light 15.548836 15.529691 15.567981 8 h after light 17.684476500000002 17.373244 17.995709 12 h after light 14.614571 14.226777 15.002365 4 h after dark 14.989683 14.956176 15.02319 8 h after dark 14.978435000000001 14.388889 15.567981 12 h after dark 16.978648 16.978648 16.978648