OLED lighting is an emerging solid-state lighting technology. It potentially provides a route into the large and growing global lighting market. It however faces a critical differentiation challenge vis-à-vis incumbents such as inorganic LED lighting. IDTechEx has assessed the technology and markets for OLED technology in the lighting sector. We find that the market will be slow to take off until 2019/2020 but will reach 2.5 billion USD in 2027.