LAMP Russian patent published in 2010 - IPC F21S10/00 

FIELD: lighting.

SUBSTANCE: lamp includes housing, light sources with various spectra, the main hollow reflector made in the form of ellipse with mirror surface, and additional reflector and diffuser, each of which is made in the form of a plate and located parallel to each other. Additional reflector and diffuser are made in the form of system of concentric relief straps with thin-film reflecting coating on one plate hinged to external front surface of the housing. To upper surface of the housing there attached is suspension rod with the main hollow reflector made in the form of ellipse with mirror surface. Inside the main hollow reflector there installed is printed board in holes of which there installed are light sources with various spectra. Lamp is equipped with controller located in the housing whereto light sources with various spectra are connected.

EFFECT: enlarging application fields, increasing the number of light transformations, providing dynamic change of brightness and chromacity of colour picture in space and time, strengthening decorative effect owing to development of flickering colour picture similar to the view of act of nature.