http://en.m.wikipedia.org/wiki/Concentrated_photovoltaics http://www.zenithsolar.com/ http://www.suncorepv.com/index.php?m=content&c=index&a=lists&catid=99 https://www.google.hu/search?q=cpv+receiver&client=safari&hl=en&source=lnms&tbm=isch&sa=X&ei=MYRPU7TZLcSWtAasuoEI&ved=0CAcQ_AUoAQ&biw=320&bih=460 Erdekes.... Arnold Sent from iPhone