This paper is intended as a first basic document of a more general white paper on smart lighting. Distributed Artificial Lighting systems penetrate into the internal and external human environment in a complete osmosis and with their smart interactive function practically become an all-seeing eye, a “big eye”, of human activities. Smart lighting indoor and more especially outdoor constitutes a mesh (“web”) that is able to detect, memorize, identify and communicate. Smart lighting included in an $\mathbf{IoT}$ system is extending its performances to multiple purposes in addition to the sole function of lighting, but safeguarding environmental lighting problems, safety, security and ethical-social impacts.