Sign & Digital Graphics

June '18

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20 • June 2018 • S I G N & D I G I T A L G R A P H I C S ELECTRIC SIGNAGE sign faces and lumen output when mak- ing a decision. "Lighting output of LED retrofits is a matter of choosing the right type and quantity of modules," Anderson says. "It's a fairly easy swap from neon or florescent to LED with white faces. If the faces are a deep, saturated color you should plan on significantly more product to achieve the lumen output and even face illumination the sign had before." Color temperature is a factor that will also come into play. "Warm white LEDs tend to look bet- ter behind yellow and orange faces," Anderson continues. "Cool white behind green, turquoise, etc. For blue, there are blue LEDs that may look better depend- ing on the shade. For red faces of course, there are red LEDs and that is generally what should always be specified in this face color." Taking the LED and comparing it to what is being replaced, Reis says that "'Sign White' is a term that we used for white 6,500K neon. What you really want to look for is the CRI (Color Rendering Index) of the color of white LED light. The higher the CRI number (e.g., 80, 90, etc.) the better the white light will render the colors that you are illuminating." For example, if you're using a 6,500K LED with a 70 CRI, the colors will not show as true as one with a higher CRI, like 85 CRI. "This also holds true for the higher color temperatures," says Reis. "Just because an L E D manufacturer has 10,000K LEDs in their module does not mean it will be brighter than 6,500K LED modules. It just means that it will be a very cool blue and normally a low CRI." Benefits and Rewards When Mega Volt's Anderson rolled up his sleeves and went to work on the project for his florist customer, he landed on one option out of several, implement- ing a new design with a routed aluminum face. "In the end, I opted for a side-illumi- nating product from Principal LED," he says. "Most module manufacturers now Appropriate LED spacing will ensure the sign is illuminated evenly with no hot spots. (Images courtesy of Sloan LED)

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