Re: Smart streetlight? FFS, why?
The problem with IoTing such infrastructure is the expected life of such things.
Around here the replacement cycle for lighting seems to be around the 50 year mark. So, with the current market, you get security updates for 2 years... In that time, given a reasonable sized city, you probably haven't upgraded 10% of the lights, so they'll be out of support before you've even managed to roll out the smartlighting system.
I'd prefer a simpler solution that doesn't offer security problems, if it is going to be running for decades. The "worst" they can do is tell you a light is on when its off or off when its on.