The illumination module for emitting light (5) can operate in at least two different modes, wherein in each of the modes, the emitted light (5) has a different light distribution. The module has a mode selector (10) for selecting the mode in which the module operates, and it has an optical arrangement. The arrangement includes—a microlens array (LL1) with a multitude of transmissive or reflective microlenses (2) which are regularly arranged at a lens pitch P (P1);—an illuminating unit for illuminating the microlens array (LL1). The illuminating unit includes a first array of light sources (S1) operable to emit light of a first wavelength L1 each and having an aperture each. The apertures are located in a common emission plane which is located at a distance D (D1) from the microlens array (LL1). In a first one of the modes, for the lens pitch P, the distance D and the wavelength L1 applies P2=2.Math.L1.Math.D/N wherein N is an integer with N≥1.

The illumination module for emitting light (5) can operate in at least two different modes, wherein in each of the modes, the emitted light (5) has a different light distribution. The module has a mode selector (10) for selecting the mode in which the module operates, and it has an optical arrangement. The arrangement includes—a microlens array (LL1) with a multitude of transmissive or reflective microlenses (2) which are regularly arranged at a lens pitch P (P1);—an illuminating unit for illuminating the microlens array (LL1). The illuminating unit includes a first array of light sources (S1) operable to emit light of a first wavelength L1 each and having an aperture each. The apertures are located in a common emission plane which is located at a distance D (D1) from the microlens array (LL1). In a first one of the modes, for the lens pitch P, the distance D and the wavelength L1 applies P2=2.Math.L1.Math.D/N wherein N is an integer with N≥1.

A recessed lighting fixture comprises a generally annular body having a central cavity in the form of a partially spherical socket. There is a lighting support member having a partially spherical exterior portion which is closely fitted within the partially spherical socket of the annular body. The lighting support member is pivotable relative to the annular body, but air flow between the partially spherical socket of the annular body and the partially spherical exterior portion of the lighting support member is substantially restricted. There may be a light source mounted to the lighting support member adj acent a bottom thereof. The light source may be a light-emitting diode.

A recessed lighting fixture comprises a generally annular body having a central cavity in the form of a partially spherical socket. There is a lighting support member having a partially spherical exterior portion which is closely fitted within the partially spherical socket of the annular body. The lighting support member is pivotable relative to the annular body, but air flow between the partially spherical socket of the annular body and the partially spherical exterior portion of the lighting support member is substantially restricted. There may be a light source mounted to the lighting support member adj acent a bottom thereof. The light source may be a light-emitting diode.

Disclosed are a light emitting assembly and a light emitting device. The light emitting device includes a first light emitting element, a first light transmission portion and a driving portion, The first light emitting element emits a first light beam. The driving portion can drive the first light emitting element or the first light transmission portion, such that a position relationship between the first light emitting element and the first light transmission portion is switchable between a first state and a second state. In the first state, the first light beam passing through the first light transmission portion presents a first pattern; in the second state, the first light beam passing through the first light transmission portion presents a second pattern which is different from the first pattern.

Disclosed are a light emitting assembly and a light emitting device. The light emitting device includes a first light emitting element, a first light transmission portion and a driving portion, The first light emitting element emits a first light beam. The driving portion can drive the first light emitting element or the first light transmission portion, such that a position relationship between the first light emitting element and the first light transmission portion is switchable between a first state and a second state. In the first state, the first light beam passing through the first light transmission portion presents a first pattern; in the second state, the first light beam passing through the first light transmission portion presents a second pattern which is different from the first pattern.

A recessed lighting fixture comprises a generally annular body having a central cavity in the form of a partially spherical socket. There is a lighting support member having a partially spherical exterior portion which is closely fitted within the partially spherical socket of the annular body. The lighting support member is pivotable relative to the annular body, but air flow between the partially spherical socket of the annular body and the partially spherical exterior portion of the lighting support member is substantially restricted. There may be a light source mounted to the lighting support member adjacent a bottom thereof. The light source may be a light-emitting diode.

A recessed lighting fixture comprises a generally annular body having a central cavity in the form of a partially spherical socket. There is a lighting support member having a partially spherical exterior portion which is closely fitted within the partially spherical socket of the annular body. The lighting support member is pivotable relative to the annular body, but air flow between the partially spherical socket of the annular body and the partially spherical exterior portion of the lighting support member is substantially restricted. There may be a light source mounted to the lighting support member adjacent a bottom thereof. The light source may be a light-emitting diode.

A light irradiation device includes a light source, an optical member and a sensor. The light source emits light. The optical member is supported so as to rotate around a rotation axis and includes a prism part that emits detection light based on the light. The sensor receives the detection light and detects a light amount of the detection light. The light amount of the detection light received by the sensor changes depending on a position of the optical member in a rotation direction when the optical member rotates.

A light irradiation device includes a light source, an optical member and a sensor. The light source emits light. The optical member is supported so as to rotate around a rotation axis and includes a prism part that emits detection light based on the light. The sensor receives the detection light and detects a light amount of the detection light. The light amount of the detection light received by the sensor changes depending on a position of the optical member in a rotation direction when the optical member rotates.