Sign & Digital Graphics

August '18

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S I G N & D I G I T A L G R A P H I C S • August 2018 • 19 When determining illumination methods for back-lit, the same consid- erations are in play as with a front-lit application except for the face material. Foreman suggests examining "the depth of the return on the letter, the substrate upon which the letters will be mounted, the intensity of the halo desired, and whether the LEDs will be mounted to the face of the letters." The last point will determine whether the light will shine backward or shine into the letter and create the halo effect. Open-Face—This is where we get into some of the less introductory, more complicated methods of channel letters. "Open-face letters probably present the biggest challenge for illuminating with LEDs," admits Foreman. "Usually the desired look is that of scripted neon. This look is almost impossible to achieve with regular LED modules. There are several LED companies that offer flex- ible LEDs that simulate neon, and these are the best choices for open-face chan- nel letters." The lighting aspect of open-face let- ters is the main consideration with these projects. "Open-face channel letters were originally designed to house exposed neon and were typically fabricated to a three-inch depth, which would provide a shroud around the exposed neon but at the same time be readable from an angle," explains Eppert. "While these types of letters fell out of popularity with the arrival of LEDs, they have been mak- ing a comeback within the design and Trim cap is molding that holds an acrylic face to the return on the letter. (Image courtesy of US Sign & Fabrication) Ask questions about where and when the sign will be seen—inside or outside, day or night—and then make decisions about the lighting. (Image courtesy of US Sign & Fabrication)

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