Please connect it to your home network with wireless connection and make sure you have a stable Internet connection. Lightning device will check for the latest firmware then download it automatically when powered up or every 2 hours while it is running.
You will receive a notice in Lightning DS to proceed the firmware update after the download is finished. It is highly recommended to connect your Lightning device with a WiFi Internet connection while you use it so Lightning device can receive all necessary updates immediately after they are available.
If you not able to get update, please contact us about this issue.