This products could be linked up to 20pcs ,punching diameter is 28mm .

Thew diameter of the power card should be based on the actual maximum current the product power ,cabling .

Easy intstallation bign brihtmess saFE And energy conseration long lifesapan low brightness declines .widely7 used in age -sizeLOGO advertisement billbord exposed luminous characters paited scteen ,the spacing between lamps can be chose according to rhe buliding beight ,the best center distance is 5cm-