[Radiance-general] Gendaylit Visible radiation

[Julien Boutillier]

Hi Jan and Lars, 

Thanks for your explanation.

I understand well now.

Cheers

Julien

Le 5 févr. 2013 à 20:31, Lars O. Grobe a écrit :

> Hi Jan!
>> just to avoid some confusion about input and/or output:
> Thank you for the clearification, I was writing my latest message from what I remembered on a phone...
> 
> So far, whenever possible, I have avoided the whole conversion and its implied assumptions by using illuminance for input and -O 0, which allows me to stay with the conversion by a luminous factor of 179 lm / W as I use it everywhere else in Radiance. The weather data I use has a column with photometric units, and as I am interested in luminance and illuminance as the result of my simulations, I try to avoid introducing any additional conversion. One should however be aware that fields in weather data may actually be derived from models of luminous efficacy, too, as not every station measures both irradiance and illuminance...
> 
> Cheers, Lars.
> 
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