With so many different networks to choose from, it's really hard to know which one to use to build your Smart Lighting and Smart City projects on.
Proprietary technology or Standardised protocol? NB-IoT or LTE-M? Sigfox or LoRaWAN? ZigBee, Bluetooth, Wi-Fi, 6LoWPAN, Wi-Sun or one of the many, many other unlicensed and licensed wireless protocols that make up the IoT and Smart City technologies available today.
Each has its own positives and negatives, from cost, range, data rate and gateway to node ratio. Some are well matched to the standard applications and of course manufactures will always push the technology they have built their sensors to interact with, but trying to use a single network for all applications will always result in over design or failure.
As J.R.R. Tolkien wrote in his great series of books - The Lord of the Rings - "One Ring to Rule Them All", but there is NOT one network for all Smart City applications.
Each application, be it Smart Parking, Video Analytics, Smart Lighting, Smart Bins or Traffic Counting has its own set of data requirements, installation and scalability features, along with data costs and power requirements.