+x Warren (Staff) - 2/18/2020 10:56:49 AMTypically you would want something like a 200gsm (or similar, eg 210gsm we sell) cloth for the surface layer and some backing reinforcement. If it is supporting the weight of the LED lights, perhaps around a mm thick which would be 4 layers of a typical 200g cloth or less layers if you back up with a thicker cloth.