Re: Smart streetlight? FFS, why?
Variable brightness depending upon visibility - make the light brighter when there is thick fog or heavy rain.
I heard one story (can't find a link) about smart streetlights that texted taxi drivers when they detected rain to indicate that there may be an increase in demand for covered transport.
This isn't to say I don't basically agree with you, just have a couple of examples there of why you may consider smart tech in a streetlight.