A lighting system comprising: a first controllable light source (11) configured to provide light in a first direction; a second electrically controllable light source (16) configured to provide light in a second direction; a support structure (14) comprising at least one region of light diffusing particles configured to diffuse light provided by the second electrically controllable light source such that at least a portion of the light provided by the second electrically controllable light source is output in the first direction and is mixed with the light provided by the first controllable light source.

Disclosed is a product comprising a luminous surface, the product comprising a light guide (10) providing said luminous surface, said light guide comprising a plurality of scattering elements (12) for producing a substantially homogeneous light output across said luminous surface; and a first solid state lighting element (20) arranged to emit a beam of light (30) into the light guide; wherein the light guide further comprises a body (40) arranged to create a region (50) in the light guide shaded from said beam.

A display device component includes an optical waveguide having a surface; a first material formed on a portion of the surface of the optical waveguide; and a second material formed on a portion of the first material. The first material has light scattering properties.

The invention relates to an emergency luminaire (1) with a housing (2) accommodating a light source (3) and control means (4) configured to control light emission of the light source (3). The housing (2) is configured for attaching an emergency sign unit (5) to the housing (2) such that the light emitted by the light source (3) lights the emergency sign unit (5) when the emergency sign unit is (5) attached. The control means (4) is configured to determine whether the emergency sign unit (5) is attached to the housing (2) or not; and control the light emission of the light source (3) according to a first operation mode when no emergency sign unit (5) is attached to the housing (2), and according to a second operation mode when the emergency sign unit (5) is attached to the housing. The second operation mode is different from the first operation mode.

A mirror unit includes a mirror element configured to reflect external light entering from a front surface toward the front surface, and a display device configured to show an image. The display device includes a light source configured to emit light, and a light guide element configured to guide incident light from the light source. The light guide element includes an emission surface configured to output incident light, and a plurality of light focusing portions configured to form an image outside the light guide element. The mirror element and the light guide element arranged so that the light focusing portions form an image near the front surface of the mirror element.

An illuminated color displaying device having at least one light diffusing waveguide coupled to a plurality of different light sources emitting light at different wavelengths, to provide color modulation.