Kokaa, Arnoldus V., Aries Boedi Setiawan, Mochammad Viky Aditya, and Bayhaky Bayhaky. 2017. “Design of Room Lighting Electric Power Savings Using PIR Sensor”. Proceedings of International Conference of Graduate School on Sustainability 1 (1). https://doi.org/10.26905/icgss.v1i1.1822.