"Cold" light such as that emitted by a fluorescent lamp, surrounds us and aids our comfortable life. Nevertheless, a shadow of extinction has been cast over present fluorescent lamps. Waste electrical and electric equipment (WEEE) and restriction of the use of certain hazardous substances in electrical and electric equipment (RoHS) directives restrict the use of hazardous substances (lead, mercury, cadmium and chromium, etc.) in the manufacture of electrical and electronic equipment. After July 2006, electrical and electronic equipment containing such harmful chemicals can not be introduced...