The present invention relates to a device (100) for an application of directed actinic radiation to a subject (200), said device (100) comprising: an exposition tunnel (110) being capable of surrounding said subject (200) to be exposed to said actinic radiation and being formed of one semi-cylinder barrel-shape first surface (120) made of a material substantially permeable to said actinic radiation, and of at least one second surface (140) made of said material substantially permeable to said actinic radiation and capable of complementing the first surface (120) in forming said exposition tunnel (110)； the surfaces (120, 140) of said exposition tunnel (110) separating an inner space (130) where said subject (200) is exposed to said actinic radiation, from outer spaces (150, 160) where a plurality of radiation sources (170) capable of emitting actinic radiation through said surfaces (120, 140) are mounted； said first and second parts of the chassis (180, 190) of the device (100) being configured to complement each other in forming the outer shape of the device (100)； said device (100) further comprising at least one further outer space (300) separated from said inner space (130) and located at either one or both of the longitudinal ends (111, 112) of the exposition tunnel (110), said at least one further outer space (300) housing a plurality of additional radiation sources (310A, 310B) configured to emit radiation, wherein at least one of the radiation sources (170) and the additional radiation sources (310A, 310B) comprise at least one reflector (320) or a plurality of reflectors (320). An improved device distinguishes in that at least one of the radiation sources (170) and the additional radiation sources (310A, 310B) comprise LEDs (322) or a plurality of LEDs (322), and that the at least one reflector (320) or the plurality of reflectors (320) collimate the radiation emitted by said at least one of the radiation sources (170) and the additional radiation sources (
