... : Stainless steel, Iron, Aluminium around, acrylic front flat surface panel, PVC back board, LED light ... Specifications comparison between LED epoxy signs and Acrylic signsItemsLED Epoxy lettersAcrylic lettersBrightnessHigh brightness, high transparencyLow ... goodNormalFrameworkMetal frame and high transparent epoxyMetal frame, acrylic and plastic trimSpecificVery detailed, delicacyNormal looking, rough ...