[Radiance-general] inquiry on the possibility of colored LED light simulation in Radiance

[Randolph M. Fritz]

I just entered "spectral reflectance of leaves" into Google, and a whole
bunch of material popped out. It looks like there is actually a fair bit of
research on this.

-- 
Randolph M. Fritz, Lighting Design and Simulation
+1 206 659-8617 || rmfritz3 at gmail.com

On Thu, Nov 26, 2015 at 5:24 PM, alexander jiang <
jiangalexander1989 at gmail.com> wrote:

> Hi Greg,
>
>
>
> Thanks for your info so much.
>
>
>
> But I am still confused about what you mentioned in the previous email ‘can
> characterize the reflectances of materials in each of these spectra,
> probably through measurement”.
>
>
>
> For instance, the green crops will be the objectives in the greenhouse
> environment I plan to simulate, what specifically you mean ‘can
> characterize the reflectances of materials through measurement”
>
>
>
> Regards,
>
> Alex
>
>
>
>
>
>
>
>
>
>
>
>
>
> *From:* Greg Ward [mailto:gregoryjward at gmail.com]
> *Sent:* Thursday, 26 November 2015 8:53 AM
> *To:* Radiance general discussion <radiance-general at radiance-online.org>
> *Subject:* Re: [Radiance-general] inquiry on the possibility of colored
> LED light simulation in Radiance
>
>
>
> Hi Alex,
>
>
>
> The RGB channels can represent any spectral content, so if you have 3 (or
> fewer) illuminant spectra, and can characterize the reflectances of
> materials in each of these spectra, probably through measurement, then you
> can get accurate results from Radiance.  If you have more than 3 spectra
> you want to try, you can perform sequential runs accordingly.  It's a bit
> tedious, but people have done it.
>
>
>
> Cheers,
>
> -Greg
>
>
>
> *From: *"alexander jiang" <jiangalexander1989 at gmail.com>
>
> *Subject: *[Radiance-general] inquiry on the possibility of colored LED
> light simulation in Radiance
>
> *Date: *November 25, 2015 5:55:21 PM PST
>
>
>
> Hi All,
>
>
>
> Currently I was involved in a research on how different coloured LEDs and
> the optimal intensities affect plant growth and qualities.
>
>
>
> After reading through some info online, I know that it is okay with
> simulating sunlight in Radiance but am not sure if it is possible to
> simulate different coloured LEDs (such as red , blue, orange, etc)?
>
>
>
> Regards,
>
> Alex
>
>
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>
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