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Two more benefits illustrate the value of LEDs.
3. LED light sheets. LED light sheets are very slim panels (reminiscent of acrylic panels) with perimeter embedded LED modules. The sheets have a matrix of linear cut grooves to refract light distribution from the perimeter onto the panel’s surface. With use of various diffusers, such as opal polycarbonate, a homogenous and uniform backlit effect can be achieved.
There are multiple uses for and advantages to this product. Applications range from uses such as retail display shelves, where the heat from the LED source can be dissipated at the edge boundaries with further reduction with the use of a metal bezel at the shelf edge. This allows heat-sensitive products such as perfumes to be placed on an illuminated surface for display purposes without any degradation to the products.
Other applications include providing backlit panels recessed flush within wall or ceiling surfaces where space is limited for use of conventional light boxes. The recent addition of variable color with such products further expands their use.
4. Color. LEDs can also give better saturation and rendering of color, as evidenced by the many exterior building facades now entertaining the use of color. The use of digital multiplexing, previously used for control of stage lighting and effects, is one of the most common control protocols regulating variable colors and the manipulation of pixels in both internal and external commercial lighting schemes.
The use of color can provide dramatic visual effects; however, the application of color requires careful consideration to ensure appropriate use, with coordinated external lighting schemes tending to work more successfully.
Farhad Rahim, associate lighting designer at BuroHappold Engineering, UK office, can be reached at email@example.com. Gabe Guilliams, associate principal in Lighting, BuroHappold, New York office, can be reached at firstname.lastname@example.org.
Email comments and questions to email@example.com.
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