How to render page with only the content in Omega

I'm trying to render a node with only the main content area. I'm close, but it still prints the sidebars. I'm opening a node with lightbox and having it use a specific page--node--lightbox2.tpl.php.

  <?php if (isset($page['content'])) : ?>

    <?php print render($page['content']); ?>

  <?php endif; ?>  

Can I further break down render($page['content']); so that it does not include sidebar regions?

Thanks!