This repo contains the payload data required to control light whose name has the prefix "LEDDMX-00" or "LEDDMX-03". Some of it may be applicable to other light types with similar prefixes however I have only tested with the aforementioned "00" and "03" lights. The app that goes with these lights is called "LED LAMP" although there may be others I have not yet come across.
The UUID of the service required for sending a payload is:
0000ffe0-0000-1000-8000-00805f9b34fb
The UUID of the characteristic that you should write to is:
0000ffe1-0000-1000-8000-00805f9b34fb