Hey @zahabia,
You can leave the detail level for radiance parameters the same, the crucial parameter you need to adjust is the ambient resolution
If you search the forum there’s a few posts about it, I gave a bit of an answer on it to someone else here
I’d recommend running at low detail level to start with and adjust the ambient resolution parameter (using the ambient resolution component and inputting your model and adjusting the detail level) initially to check the result pattern makes sense. Then you can increase the detail level to get a more accurate lux level / daylight factor result.