Once Compass is installed, you will have a new content channel type called "Photo Gallery". With this type, you can load a photo gallery directly from a content channel. Simply change the id of "9" to the id of the content channel and make sure "Rock Entity" is enabled on your HTML block.
{[ lightgallerycc id:'12' ]}{[ endlightgallerycc ]}
If, however, you would like a lightroom gallery without a content channel. You can do so with the code below.
{[ lightgallery ]}
[[ item title:'Adult Formation Group Event'
image:'/this/is/a/example.jpg'
classes:'additional css classes may be added here'
anchorclasses:'additional css classes for the anchor tag'
imagesize:'1200-800' ]]
[[ enditem ]]
{[ endlightgallery ]}