As the YONI is a 'backlit' module, the strips are mounted on the back wall of the lightbox. By keeping a distance of between 40 and 150 mm from the fabric, it is prevented that the individual LED's are visible as dots, but also that the brightness would become too low. Apart from these indications, several elements always influence the way the light of the modules is displayed and experienced. Think of the thickness and transparency of the fabric, or the type of visual (uniform/diverse colors). A distance of e.g. 60 mm can be suitable in one situation, but not optimal in the other. A small practical test is usually the best guarantee for success.