Sign & Digital Graphics

December '14

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S I G N & D I G I T A L G R A P H I C S • December 2014 • 27 and cost when LEDs were first being used to light channel letters. Phosphor conversion has been improved consid- erably since then and white LEDs have become the standard sign lighting source for channel letters and, increasingly, cabi- net signs. Cool White, Warm White, True White Moreover, when white LEDs were first introduced, their output was toward the extremely cool side of the kelvin range of color temperature at 8000K to 9000K (the higher the kelvin, the cooler, or bluer, the light). Now, however, white LEDs are available in a wide range of color tem- peratures, though the majority used for sign applications are 6500-7100K, which renders a clean and cool light. When white LEDs were first intro- duced, their output was toward the cool side of the kelvin color temperature range, but today they are available in a wide range of color temperatures. (Image courtesy of Sloan LED) Bitro's OmegaPrime module offers an added mechanical mounting feature and e2Gel technology for water-tight construction. (Images courtesy of Bitro Group)

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