/**
  * gets lightbulb form
  * @return string HTML div
  */
 public static function getLightBulbForm()
 {
     //get all lightbulbs from db and create button for each
     $lightArray = self::get_appliances_by_type('light');
     $form = "<div><h2>Lights</h2>";
     foreach ($lightArray as $lightID) {
         $light = new Lightbulb();
         $light->load_by_id($lightID['applianceId']);
         $button = $light->getButtonDiv();
         $form .= "<div>{$button}</div>";
         $light->activateLight();
     }
     $party = "<button onclick='commenceParty(); '>Party Button</button>";
     $form .= "{$party}</div>";
     return $form;
 }