Luminaire having light emitting diodes (leds) directed to a reflector

A luminaire with a pot-shaped housing for the reception of electrical components and for the releasable mounting of a functional unit having at least one light permeable main lighting surface and light emitting diodes (LEDs), wherein the essentially planar main lighting surface of the functional unit extends parallel to the base wall of the housing or a mounting surface of the housing and the LEDs are directed to a reflector arranged between the base wall of the housing and the main lighting surface,

• wherein
• the main lighting surface is bounded at the rim side by a peripheral flat frame made of heat conducting material, and side lighting surfaces to which light is applied are provided between the flat frame and the housing in addition to the main lighting surface;
• the LEDs are attached to at least one heat conducting carrier;
• and
• the flat frame is connected in a heat conducting manner to at least one LED carrier which is located in the functional unit in the region of the rear side of the flat frame and whose surface carrying the LEDs is directed toward the reflector such that the main lighting surface is illuminated substantially uniformly by diffuse light.