> Hi Experts,
> 
> I am looking at the suitability of POV-Ray for LED luminaries design, simulation
> and measurement of light intensity/uniformity of distribution. Here are the list
> of things I am looking for:
> 
> 1.Ability to model different (and multiple) high bright LEDs that are used in
> lighting applications in different geometric arrangement (mean different
> numbers and spatial configuration). Alternatively, convert the models that are
> available in other formats like IES, ProSource to use with POV-Ray.
> 
> 2.Create and model different type of reflectors/reflecting surfaces (of both
> geometrical and optical characteristics) and diffusers.
> 
> 3.Study/Measure the intensity levels, distribution and chromacity.
> 
> BTW, I already looked at the Colin's posting on the intesity mapping. I am
> looking at Lightsys by Jaime Vives Piqueres.
> 
> Appreciate your help.
> 
> Kanak
> 
> 
I don't think that you can get absolutely exact light distrubution, but...

You can model reflectors and lences of just about any shape imaginable. 
Then, using photons maping and a surface acting as a screen, get a good 
idea of the light distribution.
As long as the shapes, reflective values, tints, ior and dispersion 
values are a reflection if the actual ones, your results should be good.

You can also use medias to show the spacial, volumetric, distribution of 
the light.

To test various spacial arrangments of multiple lights, you only need to 
place individual lights in that arrangment, including the opaques parts.

If you are ready to use a beta version, you can use the 3.7 betas that 
can output high dynamic range images. That way, you are no longer 
limited by the dynamic range of the common graphic formats.

For the chromaticity, as the output is RGB encoded, the chromaticity 
study is prety limited. It can only be simulated using dispersion with 
refraction. It gives an approximation of a black body, at least, that's 
my impression.

You are looking at the right places, both are good resources. Lightsys 
have IES profils, and others.



Alain

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