Apparatus for lighting, especially electric lamps and luminaires; lighting apparatus and systems consisting of lighting apparatus, especially lighting apparatus and systems based on light emitting diodes (LEDs), including organic light-emitting diodes, LED lamps and LED luminaires and their parts, lighting lamps and lighting apparatus and facilities consisting of lighting lamps and lighting apparatus as well as their parts (included in this class) on basis of light emitting diodes (LED); LED-modules, namely modules constructed of LED's (inclusive organic LED's) with light functions and for lighting applications