FIELD: lighting technology.
SUBSTANCE: according to the method, an elongated light guide is used, which has in at least one axial section a base and two lateral sides tapering from the base to the top, furthermore, the base of each axial section is positioned on the end face of the light guide. The light flux is sent from at least one directional light source to the end face of the light guide, and the angle between the light flux going from the source and the light guide's elongation is taken from such a range where the light flux undergoes a total internal reflection from the tapering sides at least once in at least one axial section of the light guide, and the light flux must come out of one of the tapering sides after at least one total internal reflection.
EFFECT: transforming light fluxes into one or many light fluxes of greater cross section; more even brightness; high efficiency light input-output.
20 cl, 11 dwg
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