Nina Lutfia, I Wayan Suletra dan Fakhrina Fahma Keywords : feasibility study, ballast electronic, development plan, investment criteria. Jurusan Teknik Industri, Universitas Sebelas Maret, Surakarta Performa (2004) Vol. 3, No.1: 19-27 20 Performa (2004) Vol. 3, No.1