Invitation to the World of the Plasma for Light Sources 2.Variety of Light Sources 2.3 Mercury-Free Fluorescent Lamp

Abstract

As interests in environmental friendly products, demands from market for mercury-free fluorescent lamps become stronger. Xenon is the most expected material as a substitution for mercury for fluorescent lamps. So many researches have been done by so many researchers and recently by using external electrode with conventional discharge tube with internal electrodes droved by pulsed discharge has achieved 90 lm/W and 12000 cd/m². Another effort is using molecular gas as discharge medium. For example Ar-N₂ mixture and CO are proposed.