CS114 Illuminated Signs Case Study 20150330 ©2015 Lumileds Holding B.V. All rights reserved.

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Noveseo Rebellious I LED Light Engines

The Rebellious I LED light modules used in the new wayfinding signs at the San

Jose International Airport are ideal for applications ranging from illumi- nated signs

to channel letters and cove lighting. Part of the Noveseo family of LED solutions

from Silicon Constellations and built with LUXEON Rebel LEDs, they provide a high-

brightness, high-efficiency lighting solution offering long service lifetime, advanced

thermal manage- ment, minimum 100 lumen/watt performance, and the ability to be

driven up to 1.0A and deliver 195 lumens in constant-current configuration. A 1W/

module constant-voltage configuration is also available.

Each Rebellious I module measures just 1” x 1.5” with 12” wiring between modules

to provide maximum flexibility for lighting designers. The modules are available

in custom wire lengths, in multiple colors, and with a variety of optional optics for

addressing different light distribution applications. The Rebellious I module is UL-

listed Type II, can be used for indoor and outdoor applications in dry, damp and wet

conditions, and has a lifespan of 60,000+ hours even at an ambient temperature of

70 °C (158 °F).

the same effect as a backlight without requiring space in the

cabinet to mount a backlight panel.

This strategy would shrink the standard signage depth by

50% and yield a sleek 4” silhouette barely thicker than a non-

illuminated billboard—precisely what the airport’s architects

were looking for.

The challenge was to find an LED that would emit enough

light to produce sufficient brightness from perimeter lighting

without requiring too many LEDs or generating excess

heat. The LUXEON Rebel product solved the problem with

its minimum 100-lumen part and market-leading thermal

efficiency. It also offered other technical advantages, including

the best lumen maintenance of any power LED driven at high

currents—in this case, 700mA.

“To deliver the brightness levels we needed for perimeter

lighting, we required the best-performing LED we could get

our hands on. We needed a combination of fac- tors that

included high flux, low forward voltage and peak thermal

efficiency,” said Bojan Silic, founder and CTO of Silicon

Constellations. “The minimum 100 lumen LUXEON Rebel was

the only LED on the market that met all of our requirements.”