Sign & Digital Graphics

January '17

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Page 25 of 104

Much of the sign industry remained relatively unchanged for the next 50 years or so—until light emitting diodes (L E D s) became a viable illumination source about 15 to 20 years ago. Choosing the Right System Historically, backlighting was rel- egated to three primary forms of illumi- nation: fluorescent lamps, metal halide or neon. With the wide variety of LED systems now available, sign makers have hundreds of choices to optimize signs of about any shape, size or material. In fact, part of the problem is knowing which LED system to choose for a given sign application. In order to develop a strat- egy for choosing the appropriate LED backlighting, a sign maker needs to answer a few questions. S I G N & D I G I T A L G R A P H I C S • January 2017 • 21 This retrofit job was completed using the Street Stik system from Principal LED. (Images courtesy of Principal LED)

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