The official (commonly known as the "Buildings Update" or "Nightlights Patch" ) is the definitive official update required to enable night lighting effects on custom buildings. For players running original CD-ROM retail versions of the game, applying this patch is an essential step before installing massive community mods like the Network Addon Mod (NAM).
If you are using the original , you must download the patch manually from trusted community repositories. EA closed its official exchange servers, but the community preserves the original, safe executable files. Trusted Community Download Links simcity 4 deluxe edition v11640 patch link