[Radiance-general] Coefficient '179'

[loscotec at libero.it]

Hi everybody!

I have almost finished my thesys about tunnel lighting simulation in Radiance.

My teacher, reading it, was curious to know something more about the '179' coefficient which appear in Conversion from radiance to luminance. Can anyone give me some information about were it comes from or any reference I can have a look at?

Thanks in advance

Lucio Boscolo