Method and device for emitting mixed light colours

The method involves supplying light sources e.g. laser, for two of different primary colors (B, G, R) with current, where the light sources are temporally displaced against each other, and a light source for white light with current. The light sources are supplied with current to start and/or to end each period with a variable trailing edge and/or with a variable leading edge. One of the light sources with variable leading and/or trailing edge, particularly symmetrical to a middle period, is supplied with current in the middle period. An independent claim is also included for a device for carrying out a method for periodic emitting of mixed light color from primary color-light source.