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CoeLux: Artificial Sunlight That’s Real Enough to Trick Your Camera and Brain

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Re: CoeLux: Artificial Sunlight That’s Real Enough to Trick Your Camera and Brain

#21

Post by ogig »

Retric wrote: post #17
ogig wrote: post #6

67.000$ for a great looking light source seems too much. You can buy small houses at that price point where I live. With real windows, you know.

Looks like it's 35,000$ after 50 systems and 1 year. http://www.energysquad.com/products/coelux-45lc

I see. The article had and outdated price. I still hold my opinion, but good for them if they can keep lowering the cost. The thing does look awesome.

Re: CoeLux: Artificial Sunlight That’s Real Enough to Trick Your Camera and Brain

#22

Post by ipsum2 »

bd wrote: post #20

Somebody on reddit made a cheap do-it-yourself version for their basement office for $150 (using LED lights for plants): http://imgur.com/a/r31Gb While definitely not the same, there should be an opportunity for something costing less than $35,000 while still getting closer. For example here is DIY 90,000 lumen flashlight that supposedly cost $250-350: https://www.youtube.com/watch?v=-JVqRy0sWWY&t=3m40s Using 10 of t…

While this is is nice, the main breakthrough of CoeLux is the simulation of Rayleigh scattering, not just a bright diffused light.

Re: CoeLux: Artificial Sunlight That’s Real Enough to Trick Your Camera and Brain

#24

Post by sonium »

Sadly they write little substantial about the internal construction principle so I'm making an educated guess: Based on the pictures one can see that relatively hard shadows are created as expected by a point-like light source (like a far away sun). Also in the movie it can be seen that the 'sun' moves with the camera when the camera moves. The hard shadows would be created if all light emitting the 'window' are almost parallel, which would require some kind of optics. So I'm guessing that the 'skylight' is made of a slightly curved backside supporting a large number of white LEDs. Each LED then would have a small lense so that all light is emitted within a very narrow angle. The slight curvature of the backside would then lead to the apparent movement of the light-source if the camera moves. (Because one would look into the opening angle of a different portion of the LEDs) The blue color itself is a layer of nano-particles leading imitating Rayleigh scattering of the atmosphere.

Re: CoeLux: Artificial Sunlight That’s Real Enough to Trick Your Camera and Brain

#25

Post by bd »

ipsum2 wrote: post #22
bd wrote: post #20

Somebody on reddit made a cheap do-it-yourself version for their basement office for $150 (using LED lights for plants): http://imgur.com/a/r31Gb While definitely not the same, there should be an opportunity for something costing less than $35,000 while still getting closer. For example here is DIY 90,000 lumen flashlight that supposedly cost $250-350: https://www.youtube.com/watch?v=-JVqRy0sWWY&t=3m40s Using 10 of t…

While this is is nice, the main breakthrough of CoeLux is the simulation of Rayleigh scattering, not just a bright diffused light.

Lot of things scatter. There is probably something cheaper than $35,000 per light.

Maybe milk could be used? :)

http://2.bp.blogspot.com/-wyj6iHUndhg/UXpUk6HxfLI/AAAAAAAACu...

http://thestandardmodel.blogspot.com/2013/04/when-i-was-chil...

It feels like they charge so much not because there would be some principal engineering / technical obstacle but simply because they can. They have been the first who realized something like this can be done (now that LED lighting progressed so far) and for rich customers this is a feature that's highly desirable, so they are willing to pay so much.

They do have a good marketing. Their business model depends on others thinking there is some special magic.

I had to see that reddit post to even start questioning that something like this could be replicated.

Re: CoeLux: Artificial Sunlight That’s Real Enough to Trick Your Camera and Brain

#26

Post by nkassis »

mintplant wrote: post #23

I can't tell whether some of these pictures are photos or renderings.

I had the same reaction until I read the article. I think it's the type of objects and the small room that looks a lot like the ones used in rendering demos that gave me that same impression. Just waiting for them to put a glass of water to show transparency or something similar ;p

Re: CoeLux: Artificial Sunlight That’s Real Enough to Trick Your Camera and Brain

#28

Post by haddr »

bd wrote: post #20

Somebody on reddit made a cheap do-it-yourself version for their basement office for $150 (using LED lights for plants): http://imgur.com/a/r31Gb While definitely not the same, there should be an opportunity for something costing less than $35,000 while still getting closer. For example here is DIY 90,000 lumen flashlight that supposedly cost $250-350: https://www.youtube.com/watch?v=-JVqRy0sWWY&t=3m40s Using 10 of t…

Can LED bulbs already provide a light quality comparable with the light of the sun?

Re: CoeLux: Artificial Sunlight That’s Real Enough to Trick Your Camera and Brain

#29

Post by comboy »

marchica wrote: post #7
infectoid wrote: post #3

The article is a year old. Does anyone know where the tech is actually at now? I was expecting this to be slightly more common by now.

Now prices have fallen. We have installed about 50 systems till now

Have you explored possibility of making this light rich enough in different wavelengths to also let plants grow under it? Or is it not possible with LEDs?

Re: CoeLux: Artificial Sunlight That’s Real Enough to Trick Your Camera and Brain

#30

Post by cmurf »

haddr wrote: post #28
bd wrote: post #20

Somebody on reddit made a cheap do-it-yourself version for their basement office for $150 (using LED lights for plants): http://imgur.com/a/r31Gb While definitely not the same, there should be an opportunity for something costing less than $35,000 while still getting closer. For example here is DIY 90,000 lumen flashlight that supposedly cost $250-350: https://www.youtube.com/watch?v=-JVqRy0sWWY&t=3m40s Using 10 of t…

Can LED bulbs already provide a light quality comparable with the light of the sun?

Depends on what you mean by comparable. LEDs (and CFLs) aren't blackbody radiators. It's possible with many fine tuned LEDs you can get a spectral power distribution approximate to that of the sun, but... for now it's expensive. And difficult to make consistent.
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