Artificial lighting system for simulating a natural lighting

A lighting system for illuminating an environment with a light that visually simulates natural lighting, the lighting system comprising:

• a first light source configured to emit a beam of visible light;
• a diffused-light generator delimited by an inner surface configured to receive the light beam, and by an outer surface, said diffused-light generator being at least partially transparent to the light beam, being configured to transmit at least part of the light beam, and being further configured to emit, through the outer surface, visible diffused light, the correlated color temperature (CCT) of the transmitted light being lower than the CCT of the visible diffused light;
• and
• a structure that defines a cavity in which the first light source is housed, the diffused-light generator separating the cavity from the environment, the structure being configured to be optically coupled to the environment via the diffused-light generator and to be arranged relative to the first light source,
• wherein:
• any portion of the structure that is directly optically coupled to the environment via the diffused-light generator has a substantially uniform absorption coefficient in the visible range at least equal to 70% and uniformly absorbs incident luminous radiation in the visible range to thereby provide a background having a substantially uniform low luminance.