Sign & Digital Graphics

January '19

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S I G N & D I G I T A L G R A P H I C S • January 2019 • 17 building when choosing the LED color," Bluhm suggests. "Different kelvin temps (white tones) react better than others with the color of the building. Warm Kelvins (3000K-5000K) work best with browns which are typical stucco colors, whereas darker building colors react bet- ter to cooler kelvin temps around 6500- 7100K." Sign makers adhere to this rule. Tony Wheeler is the president of SignMonkey. com, and he has provided all types of channel letter signage to customers. During his time in the business he has noticed the pros and cons of halo-lit signs. "If the wall is too dark or rough to get the reflection required, or if the sign will be viewed at an extreme angle, that would make a halo lit sign unreadable," Wheeler explains. "In the case of the sign being installed at an extreme angle to the traffic, we suggest a halo-lit and face-lit sign. This gives you the best of both worlds; you get the cool halo effect the customer is wanting and the read- ability of face-lit. You don't however get the daytime 'metal letter' look." LED Elements Whenever the subject of LED lighting arises, two main characteristics of bright- ness and longevity come along with it. With halo-lit letters, brightness contin- ues to be a hot topic. "Although brightness is subjective, you should provide enough light so the outline of the letter is legible," explains Bluhm. "You should also consider the distance of the standoff that holds the let- ter at a specified distance from the build- ing. If you are too far, the letter is blurry and hard to read. If you are too close, you may not have enough room to spill the light around the letters. Most com- panies set the standoff distance around 1.5 inches off the wall." Blum states further that most halo lit letters are 3.5 inches deep and typically LEDs are mounted on a clear polycar- bonate back facing into the letter. "We suggest you use an LED that is bright enough to allow for the light to This halo-lit sign was installed by Outdoor Dimensions and uses Principal LED's Street Fighter Heavyweight in True White. (Image courtesy of Principal LED) GemLite vacuum- formed letters are UL Certified and pro- duced with a two-part construction of faces and cans. (Image courtesy of Gemini Sign Products)

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