Hello Roger, Foremost we sincerely apologize for your negative experience and apologize for any confusion the website wording may have caused. We would like to mention that the dimmer "may" be installed into any new or existing DC LED system, however please coordinate with the manufacturer of other lighting products as well for confirmation. If you have any questions or concerns in the future please feel free to contact our customer care team at 1-800-289-8739 for assistance. Thanks, - Trex Customer Care Team