Interior lighting consumes on average 31% of the total electricity use for a K-12 school. Occupancy sensors in classrooms and hallways can control lighting and lower energy costs. APS has a rebate that pays as much as 90% of the cost to install occupancy sensors. Visit us online to learn more about Express Solutions. Show your students how to be energy smart. Take advantage of incentives for installing solar technologies, including PV panels, solar water heating or solar daylighting. Click here to learn more about APS renewable energy incentives.