Light management system with an integrated energy function for automatically configuring a lighting system at a lower energy consumption, wherein the system is adapted to - means for receiving energy information about light fixtures of the lighting system, wherein the energy information comprises an energy consumption of the light fixtures at different operating conditions, and - means for automatically rendering a lighting atmosphere with the lighting system, the lighting atmosphere comprising light effects, characterized in that the system further comprises means for reading from a file an abstract description of the lighting atmosphere, and wherein the means for automatically rendering the lighting atmosphere with the lighting system is adapted to render the lighting atmosphere in a two step process comprising - a first step for evaluating suited configuration settings for the light fixtures of the lighting system, based on the abstract description of the lighting atmosphere, without taking the received energy information into account and computing initial configuration settings for the lighting system, and feeding the initial configuration settings to the light fixtures via network connections, and - a second step for adjusting the initial configuration settings for yielding similar light effects, but requiring lower energy consumption, by computing, by the lighting management system, adjusted configuration settings for the light fixtures using a multiobjective optimization technique taking into account - a photometric rendering accuracy bound for fixing how much degradation can be tolerated to label smilar light effets as acceptable, - an energy efficiency constraint, and - the received energy information with regard to energy consumption of the lighting system. - means for receiving energy information about light fixtures of the lighting system, wherein the energy information comprises an energy consumption of the light fixtures at different operating conditions, and - means for automatically rendering a lighting atmosphere with the lighting system, the lighting atmosphere comprising light effects, characterized in that the system further comprises means for reading from a file an abstract description of the lighting atmosphere, and wherein the means for automatically rendering the lighting atmosphere with the lighting system is adapted to render the lighting atmosphere in a two step process comprising - a first step for evaluating suited configuration settings for the light fixtures of the lighting system, based on the abstract description of the lighting atmosphere, without taking the received energy information into account and computing initial configuration settings for the lighting system, and feeding the initial configuration settings to the light fixtures via network connections, and - a second step for adjusting the initial configuration settings for yielding similar light effects, but requiring lower energy consumption, by computing, by the lighting management system, adjusted configuration settings for the light fixtures using a multiobjective optimization technique taking into account - a photometric rendering accuracy bound for fixing how much degradation can be tolerated to label smilar light effets as acceptable, - an energy efficiency constraint, and - the received energy information with regard to energy consumption of the lighting system. - a photometric rendering accuracy bound for fixing how much degradation can be tolerated to label smilar light effets as acceptable, - an energy efficiency constraint, and - the received energy information with regard to energy consumption of the lighting system.