Glad you found the source, make sure Main.PreloadAllModels is set to False in your gta v folder-lspdfr-lspdfr.ini
I suggest and personally use Radiance V / Visual V (For graphic enhancement, note you need a separate file to use both those mods)
Or if your looking into specially better ELS lighting i suggest trying "Better and Brighter Emergency Lights" Linked below (sometimes you may have to fix your taxi signs as they can become very bright but a quick "taxi light too bright" google will aid you with that. Good luck! Safe Patrols