... hours 3.fine welding Description: resin waterproof frontlit led channel letter 1. The letters all 304 stainless steel for ... LED (with CE/UL/ROHS certificate), over 50, 000 hours guarantee;5. Uniform lighting, different light color every back of the letter ... screw rods fixing Application:This kind of resin waterproof frontlit led channel letter for: Shops, business, hotel, auto dealers, hospital, ...