The invention relates to a flat lamp (1) transmitting radiation in the ultraviolet, known as a UV lamp, comprising: first and second flat dielectric walls (2, 3) that are facing each other, kept substantially parallel, and sealed, to one another, thus defining an internal space (10) filled with gas (7), the first dielectric wall at least being made of a material that transmits said UV radiation; electrodes composed of first and second electrodes (4, 5), having different given potentials, for a perpendicular discharge between the walls, the first electrode at least being based on a layer arranged in order to allow overall UV transmission; and an emitting gas or a phosphor coating (6) on one main inner face (22, 32) of the first and/or the second dielectric wall (2, 3), the phosphor emitting said UV radiation by being excited by the gas. The invention also relates to the uses thereof and to the manufacture thereof.