[Radiance-general] illuminance on external facade

[Germán Molina Larrain]

Dear Ery,

the 179 is the magic number just for Radiance... is the Luminous Efficacy.
My understanding is that the Luminous Efficacy of the clear sky is around
100; but it vary.

My answer would be NO. But wait for others, there might be some hope yet.

Regards,

German



2013/3/20 Ery Djunaedy <ery.mailinglist at gmail.com>

> Folks,
>
> This may not be a relevant question for Radiance list, but I ask it anyway.
>
> If I have the solar incident (irradiance, direct and diffuse) on the
> external facade, is there a simple way to calculate/estimate the
> illuminance on the facade? The magic number 179?
>
> Thanks,
>
> Ery
>
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