It has high energy saving potential and long life, LED lighting is now the choice for most lighting applications. Moreover, it is becoming smarter and more human-centric. Some companies even use the ubiquitous lighting infrastructure for other services, which goes beyond human-centered lighting. Here, sensors can be used to collect information for the Internet of Things. This puts the lighting field in a favorable position and can play an important role in the future of smart homes, smart buildings and smart cities.