Abstract: A light strip device to be secured on or in a window jamb of a window opening of a door leaf of a rail vehicle boarding system in a nondestructively releasable manner, wherein the window opening has a window pane. The light strip device has at least: a) one light strip which is provided with a number of light sources arranged in a mutually spaced manner in rows, and b) one holding and installation profile in which the at least one light strip can be received and which is provided with an attachment to the window jamb, wherein c) the holding and installation profile has at least one light through-opening such that light generated by the light sources can penetrate the light through-openings, and the holding and installation profile is opaque with the exception of the light through-openings or d) the holding and installation profile is at least partly transparent.