The present invention is concerned with a skin treatment device, in particular a temporal hair removal device, having a light emission unit comprising a substrate having a plurality of LED dies mounted on the substrate on an area of at least 0.2 cm2, in particular of at least 1 cm2, wherein the skin treatment device is arranged to emit a treatment light pulse having a pulse length in the range of between 10 ms and 300 ms, in particular in the range of between 20 ms and 200 ms, optionally in the range of between 80 ms and 120 ms, and the LED dies have a radiant flux such that a radiant fluence on the skin of a user of at least 1 J/cm2, in particular of at least 2 J/cm2, and optionally of at least 4 J/cm2 and below 8 J/cm2 is achieved by application of the treatment light pulse.
