SemiLEDs C35 LEDs Power Luminaires in Twenty First Light’s Hotel Alpha Project

The tourist hotel complex (THC) Alpha in Moscow recently received a
new facade wall-wash from Twenty First Light ltd, a Russian manufacturer of LED
luminaire solutions. The luminaires are powered by SemiLEDs Corporation, C35
color and warm white LEDs. Twenty First Light developed three types of
saturated purple and warm white spotlights for the project with substantial
product support from SemiLEDs. The luminaires achieve what Twenty First Light
describes as both a powerful visual impact and high reliability for the
distinctive lighting scheme.

“THC Alpha is a high profile landmark in Moscow, and as such, this was a
high-exposure project for Twenty First Light that demanded a solution which
would start out visually appealing, and then stay that way over the life of the
commented Sergey Stakharny, director of Twenty First Light.
“It was very important to us that the LED manufacturer both understood what
we were trying to achieve, and would provide flexible support that minimized
our engineering challenge while streamlining the project and maximized the
reliability of the installed luminaires. SemiLEDs was able to meet those needs,
contributing to the success of this program.”

Twenty First Light developing three distinct types of luminaires for the
project including: 40W saturated purple spotlights for the individual balconies
on the building’s side, as well as narrow-beam 100W purple, and 70W warm white
spotlights illuminating the building facade for a color-fade effect from bottom
to top. In addition, a series of prototype 150W RGB color-changing spotlights,
also based on SemiLEDs C35 LEDs, were developed to allow on-site testing of
different hue and saturation effects. With the final selection being a
saturated purple, Twenty First Light engineering a static combination of blue
and red LEDs matching the specified and tested shade to optimize the
performance and value of the light combination. The LEDs were surface mounted
on a single aluminum array plate, and supplemented by secondary optics for a
10-degree beam angle. The 100W purple and 70W warm-white spotlights
respectively replaced 400W and 250W high pressure sodium lamps. This resulted
in over 70% energy savings.

Luxeon High Power

“We were very pleased to support Twenty First Light in the development
of these customized luminaires constructed around SemiLEDs C35 family of
commented Dr. Ilkan Cokgor, Executive VP of Sales and Marketing for
SemiLEDs. “One big promise of LEDs is to enable the kind of design
flexibility that Twenty First Light devised, allowing the end-specifier to see
a dynamic test luminaire for color selection, and then translating that into a
cost-optimized, and highly reliable production solution set. That flexibility
demands a wide product offering, robust technology, and a manufacturer that has
the ability to interact with the luminaire designers with individualized
support. It’s what distinguishes SemiLEDs as both a technology and solutions