Simple RGB hexagonal light feature, it's secured to the wall with nail replacement adhesive (pattex, but any brand will do). 

Each internal wall measures 78.6mm so make sure you have enough LED strip to cover all of the internal walls for the number of tiles you want, you will need to do so if you want a seamless hexagon of light.

 In this example a 3 meter strip was barely enough for 4 tiles, the 5 meter one from bambu will give you a couple more, maybe 3. 

Put them in any orientation, i made cable passes in all directions.