Light is the connection between objects and human beings and it assures visual perception. Changing light the colours and the feeling of paintings change. In these years there is a great revolution in the lighting market, new lighting sources are developed and they allow sophisticated and innovative solutions. The research for LED obtained important and exceptional results offering new technologies able to open new lighting scenes. This new lighting source offers many advantages and also a wide variety of different lighting spectrum not expected in the past years. To find the best light it is important every time but it is fundamental speaking of visual art. Light in fact is able to interfere on conservatory aspects and to change colours and the final visual effect of artworks.