Abstract: The present invention relates to a light source comprising a wearable article, one or more exchangeable light chains comprising a sequence of light sources on a longitudinal strip, and arranged on the wearable article, and a power source for powering the light chain, wherein the wearable article comprises at least one elongated and closable pocket adapted to receive said one or more light chains, the pocket comprising an opening adapted for passage of the light chain in and out of the pocket and a locking member adapted to lock the opening of the pocket, and the pocket is transparent for light on a front side of the wearable article.