Thank you all for your help.
I want to check the energy saving for the building by changing the windows size in each facade but of course the smaller the windows the better the result.
So I want to enter another parameter. natural light.
Can I model the building with natural light
combined with energy light?
Can I create a zone where I need the illumination in that zone will be 400 lux?
And then check for windows size?
Thank you so much for all the help