Coming to Light
Near the top of my own or many others’ all-time best film lists is The Godfather. I’ve seen the full movie – no easy viewing with a run time of two hours and 55 minutes – at least 20 times from start to finish. With each showing, I notice something new. The way Michael Corleone’s demeanor toward his girlfriend-turned-wife, Kay, flips from warmth to emotionlessness after he assumes control over the family business? Pretty easy to spot. Oranges (the fruit) and the color orange forecasting impending doom? Not so subtle after a few viewings. But something I recently noticed during a holiday viewing was the lighting, particularly the way cinematographer Gordon Willis and director Francis Ford Coppola manipulated it to convey characters’ moods and blur lines between good and evil. I found myself pondering how the tone of particular scenes would have looked with different lighting, even certain flexible LED products I had researched. Admittedly, it is doubtful that even the most impressively lit channel letters could’ve distracted Sonny Corleone long enough to prevent his grisly demise at the tollbooth.
Richard Holzer, vice president of Xacto Signs, a custom sign wholesaler in Cleveland, remembers first observing LEDs in European airports back in the ’90s. “LEDs came first in Europe, then here [in the US],” said Holzer, who is French. “They’ve gotten brighter, and also smaller and smaller.” Within the world of LEDs exist flexible LEDs (meaning LED lamps mounted on a flexible substrate), which encompass myriad products and various interpretations of flexible LED classification. For instance, should flexible LED tubing that functions as neon tube lighting or neon replacement lighting be categorized under flexible LEDs? The answer lies in the eye – or diode – of the beholder, but for our purposes, products such as G2G Lighting’s Aurora Flex and Aurora Flex Mini are included. In addition to neon lighting, flexible LEDs can be sorted into linear border tubing (the LED is encapsulated or embedded inside a silicone or plastic tube) and tape lighting (with a “V” shape essential to its bending properties). Linear border tubing and tape lighting are created with different printed circuit boards (PCBs) and separate manufacturing processes. Possible applications for flexible LEDs range from lighting routed acrylic letters and channel letters (such as halo- or shallow-lit), to edge-lighting signage panels, to cove and display lighting.
“The demand for flexible LEDs is getting bigger and bigger,” Holzer said, adding that most of Xacto’s flexible LED projects involve channel letters and edge lighting. However, the literal size of the projects is decreasing. “These small letters and signs are something that we have to manufacture, and do so competitively,” said Mike Hobbs, co-owner of Integrity Signs Solutions (New Albany, IN), a wholesale sign fabricator. “But that is what defines a good sign fabricator – figuring out how to make it happen.”
Not everyone in the industry is experiencing the same development, which highlights the wide spectrum of projects available in the signage world. “Of all the striping systems, the flexible LED is not utilized quite as much. Not every [lighting] company has it,” said Lenny Diaspro, senior sign territory manager for Graphics Solutions Group (Dallas), a wholesale distributor, though Diaspro did note that the market is still developing and that he found the neon replacement technology attractive. Denny Meyer, general manager of United-Maier Signs (Cincinnati), said he believes the sign industry has embraced flexible LEDs, but that his company simply doesn’t come across the technology very often. “There’s not a lot of applications for the flexible LED in the majority of the work we do,” Meyer said, “but I’m sure there are sign companies that are using the heck out of them.”
DO YOUR HOMEWORK
There are a handful of considerations when choosing the right flexible LED for your sign project, and the first of those is heat sinks/heat sinking. Heat sinks refer to the devices within LEDs that absorb and diffuse surplus heat away from the diode, as too much heat equates to lower light output, color alteration and a decline in LED life expectancy. Heat sinking issues can be solved at the production line – the better the manufacturing, the less it becomes a problem.
A common issue with LEDs is hot spots, or areas of uneven brightness within a lit sign. This can cause LEDs to fail, and amplifies the need for proper distribution of the diodes within an LED. Hot spots can be caused by improper LED placement, power supply issues, and even the shape and depth of the sign itself.
Soldering one strip of lamps to another is a divisive subject. Failure to solder increases the risk of moisture damage to LEDs, and improper soldering brings its own risks. An alternative is a pre-made connector, but that avenue is precarious because it requires LED plug-ins on either side, which creates more opportunity for moisture damage. Soldering can be time-intensive and difficult to learn, though. “Some of us remember when we could run down to RadioShack and pick up some craft or hobby electrical things to solder up with a circuit board,” Hobbs said. “Unless you have extra arms to help hold things in place when soldering, this is a very tedious endeavor. And paying two people to stand and solder all day is not cost-effective.”
The good news for sign companies is that there is a diverse collection of flexible LED products available. The aforementioned Aurora Flex (270° beam) and Aurora Flex Mini (240° beam) from G2G Lighting are both IP-65 rated and have an output of 2.8W/ft. Flexfire LEDs provides many flexible LED options, including the ColorBright RGB 300 Color Changing LED Strip Light (120° beam angle, 4.4W/ft., available in 2- or 4-in. segments), which was used to illuminate the wall sculpture at The Florida Aquarium (Tampa FL) pictured on on pages 46-47. Bitro Group has its TRACER Series, a tape module that is bendable both vertically and horizontally, and is ideal for low-profile narrow channel letter lighting. The Tracer is sold in two models, the FT 5320 (3W/ft., 2.36 in. cutting increment) and FT3113 (2.6W/ft., 1.57 in. cutting increment), with both available in 18.9-in. strip lengths.
International Light Technologies offers multiple flexible LED solutions, with its EZflx (IP-65 rated, 140° beam angle, cuttable every 1.5 in.) designed for low-profile channel letters, architectural letters and POP displays, among other applications. SloanLED has FlexiBRITE (IP-66 rated, 2.8W/ft.) and BendLUX (120° beam angle, 4.2W per strip); the former provides a neon look and the latter is best for lighting acrylic block letters, shallow channel letters and backlit halo letters. Principal LED’s Qwik Tape Series includes the Qwik Tape Punch, which sports a 120° beam angle and 4W/ft. OSRAM’s LINEARLight FLEX (12 products) and LINEARLight FLEX DIFFUSE (four products) offer a variety of solutions. Be on the lookout for sequels to each of these products, which hopefully prove to be as good as The Godfather: Part II.
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