Kajian penghematan energi penerangan jalan umum (PJU) dengan penggunaan lampu PJU hemat energi dan peredupan cahaya (Dimming) dengan mempertimbangkan intensitas aktivitas warga (studi kasus di Kota Administrasi Jakarta Pusat) = A study of energy efficiency with energy efficient lamps in street lighting system and dimming system based on the intensity of citizens activities (the case study of Central Jakarta) / Emana Fasianti