Building lighting in "only visible" levels - problem

Hi

I was building lighs in different levels (not all at the same time). Lets say I have 3 levels and I am hidding always two of them and “render”. Everything is fine, the lights in other levels arent affecting the Visible one BUT not in one case. If my light is Static, then it is affecting also the hidden ones. If my lights are Stationary/Moveable then they arent affecting my hidden levels and this is very good. Any idea why is this happening?

Cheers,
Lucas