A luminaire that adjusts a certain set of light sources according to the installation location of said luminaire with respect to an external structure. A luminaire with a light emitting surface comprising a LED driver (30); an array of light sources, the luminaire further comprising: a light output tuning unit, connected to a certain set of light sources within the array and being able to tune an light output of said certain set of light sources; an interface adapted to be operated during an installation/commissioning of the luminaire, adapted for receiving configuration information which is dimming information; and a control unit, for controlling the tuning unit according to the received configuration information; wherein the light emitting surface is a planar surface and said certain set of light sources is on at least one edge of the planar surface and wherein said array of light sources is connected to the LED driver (30) and the light output tuning unit comprises a dimming circuit including at least one shunt switch adapted to shunt said certain set of light sources off from or on to the LED driver (30).