The invention relates to a plant illumination chamber, comprising at least one internal surface configured with reflective material on its internal side and one illuminating device, wherein the illuminating device consists of a base unit and at least two light sources. The purpose of the invention is to create a plant illumination chamber, wherein a broad variation of the radiation characteristic of the illuminating device in the plant illumination chamber is possible with little expenditure on work and materials. Furthermore, the illuminating device should also be universally suitable for use in plant illumination chambers of different sizes. This object is achieved in that each of these light sources is movable on one supporting element of the base unit of the illuminating device and can be fixed with a locking device in a position of use, and in that the light sources can be moved relative to the internal surface and/or in relation to one another.
