UV lamp for treatment of the skin, which lamp has a radiation capacity substantially entirely in the UV spectrum and in the red-light spectrum, wherein the radiation capacity of the lamp in the red light spectrum between 600 nm and 700 nm is at least 3% of the radiation capacity in the UV spectrum. In a first embodiment the lamp is a UV fluorescent lamp, having a first UV emitting phosphor and a second red light emitting phosphor, wherein the red light emitting phosphor is CeGdMgB5O10:Tb,Mn. In a second embodiment the lamp is a UV HID lamp, wherein the bulb of the lamp contains LiI and/or CaI2 as a red light radiation salt.