front lit letters: 1.High bright 2.Over 100, ... to 90% energy saving 4.Environmental-protection Great luminous front lit letters have the advantage as following:1.CE , ... , environmental-protection and colorful-visible day and night4.Laser cut acrylic on the face,304# stainless steel with brushed, ... advertisement, architecture, decoration, exhibition, and lighting, etc. Great luminous front lit letters