This drupal form snippet will give me a textarea with user able to change filter to full html/wysiwyg mode.

My Questions: How can I default to to full html mode?

function MY_MODULE_admin() {
  $form = array();

 $form['format'] = filter_form($form->format);

  // MY_MODULE - ** Image 1 **
    $form['MY_MODULE_image_1'] = array(
    '#type' => 'textarea',
    '#title' => t('Image 1'),
    '#default_value' => variable_get('setup_image_1', 'image_1.jpg'),
    '#description' => "Current value =" .variable_get('setup_image_1', 'image_1.jpg'),
    '#required' => TRUE,
  );