3d channel letter 1.Great luminance 2.High effectiveness ... Lamp Luminous Flux4.5-7lmWarranty1year 2. Detailed Product Description 3d channel letter is our PATENT product.(1).These are ... signs, bank signs,hotel signs,hospital signs,school signs ,advertisement, architecture, decoration, exhibition, and lighting, etc .6.Our advantages( ... ).Short delivery, and shipping, to save your time. 3d channel letter