The question was answered right under that post. To turn on your lights, press N. Also, please post a screenshot every time you post in this thread.
Due to IRL reasons, I currently am not able to play beamNG and experience the new PBR update in all of it's majesty. So, instead of maxing out all the menu options and having some truly awesome graphics at 5 frames per second, I took it a step further and "rendered" a picture of the SBR4 in like barely half a frame per day... (And yes, I know it isn't technically an in-game screenshot, but it is still an image of BeamNG... Also, if anyone wants it, I've got a higher resolution scan which I can provide)
Gas Station's fanart reminded me that I forgot to post my own SBR4 fanart I did a month or so ago the original screenshot: and a recent screenshot for completeness