public static function processAddLight()
{
if (isset($_POST['addLight'])) {
//get group from passed id
$groupID = $_POST['groupID'];
$lightID = $_POST['lightID'];
$group = new LightGroup($groupID);
$group->addIdToApplianceIds($lightID);
$group->save();
echo Navigation_Menu::getPopup("Your Light has been added!");
}
}