Rectangular light

Hi,
am trying do create interior renders.

I would like to ask, how should I set rectangular lights behind windows to get real results of shining sun during the day? I am based in Europe (Czech republic). Which units and intensity would you recommend me to use?

Thank you.
Vasek

I wouldn’t use rectangular lights and for a more natural look …

https://forums.chaos.com/forum/v-ray-for-rhino-forums/v-ray-for-rhino-general/1205252-best-way-to-ight?p=1205448#post1205448