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posted by n1 on Thursday March 05 2015, @07:19AM   Printer-friendly
from the never-need-to-sleep dept.

Navanshu Agarwal writes that Italian scientists have developed an artificial LED sunlight system that looks just like real daylight streaming through a skylight. The LED skylight uses a thin coating of nanoparticles to recreate the effect that makes the sky blue, known as Rayleigh Scattering that doesn’t just light up a room but produces the texture and feel of sunlight. Paolo Di Trapani, one of the scientists who worked on the device believes that the skylight will allow developers of the future to not just build up, but also far down below the ground- without any of the "dinginess" that currently keeps us above ground.

CoeLux hopes to treat seasonal affective disorder, or SAD. Each year, some 10 million Americans, mostly women, find themselves sinking into a heavy malaise during the wintertime. CoeLux hopes its LED bulbs, which create the illusion of infinitely tall, bright blue skies, will help trick the brains of people with SAD, ridding them of their blues.

 
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  • (Score: 5, Interesting) by anubi on Thursday March 05 2015, @07:49AM

    by anubi (2828) on Thursday March 05 2015, @07:49AM (#153440) Journal

    might do the same thing?

    I have been playing with those 10-Watt LED's so common on AliExpress... warm white and cold white ones.

    I have retrofitted some old light fixtures to use LED's by putting both warm white and cold white LED's in an array.

    At full brightness, both varieties of LED are ON fullbore.

    As I dim, the cold white LED's are the first to go. As they near extinguish, the warm white LED's start seeing the power cut.

    Looks remarkably like an incandescent dimming. The color of the light goes yellower as the light dims, until its out.

    The trick is in the diffuser. Never let an individual LED be seen. That spoils the whole effect.

    I was looking for something that was bright white when I need intense illumination, but would dim down nicely to a homey warm mood light.

    I liked the idea of the skylight. I am now thinking of ordering an array of blue LED's just for this purpose.
     

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  • (Score: 5, Informative) by brocksampson on Thursday March 05 2015, @09:51AM

    by brocksampson (1810) on Thursday March 05 2015, @09:51AM (#153453)

    That is actually how the (latest) Philips wake-up light simulates sun rise/set with LEDs.

  • (Score: 2, Informative) by Anonymous Coward on Thursday March 05 2015, @02:39PM

    by Anonymous Coward on Thursday March 05 2015, @02:39PM (#153509)

    Sylvania has their Sunset Effect LED [candlepowerforums.com] that changes the color temperature to the warmer as you dim it.