Photovoltaic system as the renewable energy source became much important particularly together in LED based illumination systems application. This paper presents an analysis and review study of solar energy data with seasonal variation in Northern Cyprus, which has one of the highest solar energy potential in Europe. Also numerical and simulation studies are applied to analyze and review of solar energy potential in Northern Cyprus. Measurements taken at two different sites of the northern part of the island are compared and evaluated to simulated results in this paper, and furthermore some actual production data from a photovoltaic farm is presented for further evaluation of the solar energy potential of the island.