A lighting system for simulating natural lighting, specifically sunlight illumination, the lighting system comprising: a light source for providing a light beam of directed non-diffused light with a first correlated color temperature along a main light beam direction, wherein a propagation direction of the directed non-diffused light is essentially parallel to the main light beam direction in an inner area and is increasingly inclined with respect to the main light beam direction with increasing distance from the inner area; and a lamp shade-like structure comprising a bottom unit to be illuminated from the light source at one side and a screen structure provided at an opposite side, the bottom unit and the screen structure defining a light passage, wherein the bottom unit comprises a diffused light generator for generating diffused light at a second correlated color temperature, which is larger than the first correlated color temperature, is at least partially transparent for the directed non-diffused light of the light beam, and is configured such that at least a divergent light beam portion of the light beam enters the light passage, wherein the divergent light beam portion is defined by its main light beam direction when the divergent light beam portion exits the diffused light generator and propagates within the light passage; the screen structure comprises a side wall with a light scattering surface that is spatially oriented towards the main light beam direction of the divergent light beam portion, such that the light scattering surface is illuminated by at least a part of the divergent light beam portion during operation of the light source, thereby providing an illuminated screen section (394, 395) acting as a scattered light source; and wherein the orientation of the main light beam direction directly upstream of the diffused light generator is selected such that the screen structure further comprises a non-illuminated screen section (392, 393, 396, 397), which is not directly illuminated by the divergent light beam portion during operation of the light source, such that during operation of the lighting system, a shadow/light transition line (400, 402) is formed between the non-illuminated screen section (392, 393, 396, 397) and the illuminated screen section (394, 395). a light source for providing a light beam of directed non-diffused light with a first correlated color temperature along a main light beam direction, wherein a propagation direction of the directed non-diffused light is essentially parallel to the main light beam direction in an inner area and is increasingly inclined with respect to the main light beam direction with increasing distance from the inner area; and a lamp shade-like structure comprising a bottom unit to be illuminated from the light source at one side and a screen structure provided at an opposite side, the bottom unit and the screen structure defining a light passage, wherein the bottom unit comprises a diffused light generator for generating diffused light at a second correlated color temperature, which is larger than the first correlated color temperature, is at least partially transparent for the directed non-diffused light of the light beam, and is configured such that at least a divergent light beam portion of the light beam enters the light passage, wherein the divergent light beam portion is defined by its main light beam direction when the divergent light beam portion exits the diffused light generator and propagates within the light passage; the screen structure comprises a side wall with a light scattering surface that is spatially oriented towards the main light beam direction of the divergent light beam portion, such that the light scattering surface is illuminated by at least a part of the divergent light beam portion during operation of the light source, thereby providing an illuminated screen section (394, 395) acting as a scattered light source; and wherein the orientation of the main light beam direction directly upstream of the diffused light generator is selected such that the screen structure further comprises a non-illuminated screen section (392, 393, 396, 397), which is not directly illuminated by the divergent light beam portion during operation of the light source, such that during operation of the lighting system, a shadow/light transition line (400, 402) is formed between the non-illuminated screen section (392, 393, 396, 397) and the illuminated screen section (394, 395).