Solid-state sources of light offer new possibilities for art display. The spectral power distribution of semiconductor light-emitting diodes (LEDs) is restricted (does not contain ultraviolet and infrared components) and has conserving impact on paint pigments and other materials. In addition, the use of smart computer-driven clusters of white and coloured LEDs allows for controlling colour temperature and colour rendering quality of light source and simulating different lighting conditions (dim, bright, artificial and natural light) in order to saturate colours that are faded due to the pigment aging and to individually adjust visual appearance of the artwork. The proposed smart lighting technology will benefit from the previous scientific results of the research project MIP-73/2010 that has set the guidelines for the development of light sources with colour quality control. A prototype device will be developed in order to implement efficient and conserving lighting that will allow for the partial compensation of a colour palette damaged by age. The device will be demonstrated in the National M. K. Č iurlionis Art Museum for the illumination of a particular painting artwork mastered by M. K. Č iurlionis. The subjective assessment of artistic visual expression will provide a basis for the creation of a prototype of the tetrachromatic light source mounted in the fixture of a standard lamp that will be offered for industry.