ISO/IEC 29341-7-2:2008(E) describes the functionalities of switching the light source on or off, changing the intensity of the light source and gives a definition of interaction between switch power and dimming service. The series of ISO/IEC 29341 publications defines an architecture for pervasive peer-to-peer network connectivity of intelligent appliances, wireless devices and PCs. It is designed to bring easy to use, flexible, standards-based connectivity to ad-hoc or unmanaged networks whether in the home, in a small business, public spaces or attached to the Internet.