http://ec.europa.eu/energy/lumen/overview/howtochoose/packaging/packaging_el.htm
http://www.flashlight.gr/index.php?maincat=12&newsid=641&subcat=37
http://www.decobook.gr/texnika-arthra/fotismos/436-2010-10-03-19-26-02
http://techteam.gr/forum/topic/89540-Ta-tria-eidh-lampthron/
http://www.lighting.philips.gr/connect/tools_literature/index.wpd