Markup: templates/output/04-elements/images/lightbox-image.html
<figure class="image"><a class="lightbox" href="https://placeholder.in2code.de/700x525" data-type="image" data-description="Image-Description Lorem ipsum dolor sit amet, consectetuer adipiscing"><img src="https://placeholder.in2code.de/700x525" width="900" height="600" alt="Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa."/></a></figure>
Source:
assets/sass/04-elements/_elements.images.scss, line 167