[Radiance-general] getting irradiance from source defined in photometric units

[Lars O. Grobe]

Hi,

I am trying to get the irradiance [W/m2] on an object surface by a HMI 
source with a known cd-distribution which I was able to get from a plot 
(I read the values [cd] from the polar plot, made a IES-formatted 
luminaire description of it and converted this using ies2rad). I had put 
"metal halide" into the [LAMP]-line of the ies, in the hope that 
radiance would match the HMI-type then.

Now I am wondering how to interpret the results. In general, I would 
assume the results of a Radiance simulation to be in W/m2, and the 
conversion to happen at the beginning, so in the lamp.tab-look-up by 
ies2rad in my case. So am I correct using the results without further 
conversion, and having -m 1 -l W/m2 as falsecolor's parameters?

Thank you, cheers

Lars.