Particularly low-profile and effective LED lamp for lighting of steps on deck. Low current consumption, watertightness and long service life are the outstanding features of this new development. The light aperture has been especially calculated for the homogenous and glare-free lighting of steps and deck. The light cone radiates downwards at an angle of 30°. Its small installation depth of 14 mm allows simple assembly which can be carried out either using 2 snap hooks or 2 screws.