1. TECHNICAL PERFORMANCE ANALYSIS OF A 40 KW PHOTOVOLTAIC INSTALLATION. Authors: FLORINA PIROI, ION PIROI, ELISABETA SPUNEI.2. STUDY ON THE IMPORTANCE OF UPGRADING PUBLIC LIGHTING SYSTEMS. Authors: MIHAI ROTARU, FLORINA PIROI, ION PIROI, ARPAD CSEPEI, ELISABETA SPUNEI.