The tourist hotel complex (THC) Alpha in Moscow recently received a dramatic new facade wall-wash from Twenty First Light ltd, a Russian manufacturer of LED luminaire solutions, using SemiLEDs Corporation (Nasdaq:LEDS), C35 color and warm white LEDs. With substantial product support from SemiLEDs, Twenty First Light developed three types of saturated purple and warm white spotlights for the project to achieve both a powerful visual impact and high reliability for the distinctive lighting scheme. Twenty First Light tackled the project by developing three distinct types of luminaires, 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 was able to optimize the performance and value by engineering a static combination of blue and red LEDs matching the specified and tested shade. The LEDs were surface mounted on a single aluminum array plate, and supplemented by secondary optics to achieve a 10-degree beam angle. The 100W purple and 70W warm-white spotlights respectively replaced 400W and 250W high pressure sodium lamps netting over 70% energy savings.
Labels: LED lighting,energy savings,wall-wash,Moscow Hotel,SemiLED
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