I added a bunch of lights to the map "West Coast USA" (+650)
They turn automaticly off and on during day/night.
But there is a problem :
You are going to experience less FPS.
In my case it was about 20-30FPS less at night.
Day : 70 - 120 FPS
Night : 40 - 70 FPS (depending on how many lights are near me)
But I am playing on High-settings.
Maybe you can get playable Framerates or more if you set down the graphics.
I did the same thing to the map "East Coast USA"
You can download it here.
(Currently working on "Utah", mostly camp lights and maybe I'll add some to the highway)
My System (if you are curious)
Vega 56 8GB with Vega 64 BIOS + OC