Many manufacturers of 'smart lighting' systems claim that connecting your lights to the Internet of Things will save energy. For example, Samsung SmartThings use energy savings as a key selling point, and have a case study that promises large savings:
All in all, after one season of using SmartThings, our home utility bill was $78 less than it was the season before.
Philips Hue also call their bulbs 'energy-efficient', although it isn't such a selling point for the Hue compared to how much SmartThings promote energy savings.
I would have thought that the majority of energy savings from turning off the lights would be negated by the extra energy used by the processing hubs and wireless radios in every device, as well as the energy requirements of any motion sensors you install.
Is it true that energy can be saved (in a typical home situation, assuming the same number and type of bulbs before/after) by using 'smart lighting' such as SmartThings or Hue, or are the benefits exaggerated in terms of energy consumption?