Could you send me a link to your scene and I will take a look what can be improved. You can send it to me in a private message.
The scene has been bundled for self-hosting in: C:\Users\User\AppData\Local\Temp\Shapespark\BUNDLES\sr_1397869-2023-12-13-09-50-05.zip.
@magda i have rendered it half on the top floors still needs to be improved. On the top floors i have put all the lights. pl check the above link.
need to ask you what strength i need to keep for sun ???
I’ve send you a private message 