I don't have this light, but based on the Reef Delight facebook page, it looks like there are a variety of possible mounting options. Do you have the lights and could you share a picture of the mounting connection? Would the RMS mounting system from Aqua Illumination work for the light, your tank, and the aesthetic that you are looking for?
The most sleek solution would be AI HMS mounts; there are 3d printed brackets (free with purchase of lights -- just let the store you are purchasing from know what you need // STL is free as well if you'd like to modify / print your own) that you can use to mount the lights on the AI HMS.
These can also be printed for any other mounting operation you choose.