Light and Dark for map

I am trying to build a map that will display what parts of the earth are in daylight and what are dark.


Is that something I can do with an earth file such as

<map name="light_test"  type="projected">
        <options>
                <lighting>true</lighting>
        </options>
    <image name="readymap_imagery" driver="tms">
        <url>http://readymap.org/readymap/tiles/1.0.0/7/</url>
    </image>
</map>

What is the proper way to add the light such as that to the entire map?