Organic photovoltaic (OPV) devices still work efficiently after sunset! To save energy and improve the sustainability of the many electronic systems, such as Internet of Thing (IoT), distributed harvesters of energy from the local environment could be particularly critical. Photovoltaic devices could be an energy source for such needs. Although traditional solar cells exhibit very high power conversion efficiencies (PCEs) under illumination at about 100 mW cm−2 of solar irradiation, the efficiency drops significantly with the decreasing light intensity. Herein (article No. http://doi.wiley.com/10.1002/solr.201700174), OPV devices may provide a solution; their PCEs are much higher under indoor lighting conditions than they are under sunlight. For example, the device is capable of delivering a power output of 22.57 μW cm−2, corresponding to a PCE of 13.76%, under illumination with indoor lighting conditions at 500 lux. These results might open up new directions for further improving the device performance of OPV devices for local energy harvesters under low‐power lighting applications.