Organic light-emitting diodes (OLEDs) are solid-state devices composed of multiple thin layers of organic semiconducting material.They emit diffuse, homogeneous, glare-free light.Due to its unique character as area light source, combined with completely new styling possibilities, OLEDs are considered as future light sources for several automotive applications like interior and signalling lamps.Their performance (efficacy, life-time) has increased in the last years and real products seem to be reachable in the medium term.Several of the recent innovations were created within the recently completed So-Light project by eleven leading German OLED companies and research institutions, supported by the German Ministry of Education and Research (BMBF).So-Light addressed the complete value chain, from primary OLED materials through to OLED-lighting applications.This contribution will report on the So-Light results (e.g.new organic transport and emitter materials, novel technologies, processes and qualification methods).These results were integrated into several design studies and prototypes of signage, architectural lighting and automotive applications.Hella prototypes of an OLED sun visor and an OLED rear lamp show on one hand the large variety of possible OLED applications, and on the other hand the completely new styling possibilities combined with OLEDs.Nevertheless, challenges like the life-time at high temperatures, UV degradation and a robust packaging technology have to be overcome before the implementation of this innovative light source.