Earlier quoted context omitted.
> Then Google found out that when the street lights turn off, there's no power to run the access points. Uh? Duh! What did they expect? A switch in every street light? (Which also would need to be controlled in some way ...)
In my experience a fully-centralised switch is actually quite uncommon. In many locations they use light sensors, and if you live above a street oriented the right way you can see quite a cool effect of the lights going off sequentially down the street as the light goes below the threshold. In other locations that I'm familiar with, they use a ripple relay, where a particular signal is transmitted over the power line…
I ran into this same problem in a the first 3 municipalities around 15 years ago when we tried deploying a street light solution.