Abstract
Energy is a scarce commodity. Diffusion of responsibility, forgetfulness, lack of knowledge and motivation are reasons for families' electricity waste. GreenCrowd is a smartphone application and IoT system to help families to decrease their electricity consumption. GreenCrowd incorporates educational, motivational and supportive features. The IoT device (smart LED lamp) reports previous consumption with a comparison to each family baseline. The smart LED lamp works as a notification tool that targets all house members. The current study presents preliminary results for electricity reduction during an intervention experiment. Also, it presents result about the effectiveness of the smart LED lamp as a notification tool.