FLUORESCENT LAMP

摘要

PROBLEM TO BE SOLVED: To provide a fluorescent lamp prevented from early solarization by an interaction of clearing oxide and ultraviolet suppression oxide contained in glass material for a luminous tube and from degradation of luminoug characteristics due to ultraviolet ray. SOLUTION: Clearing oxide and ultraviolet suppression oxide are prevented from coexisting in a composition of glass constituting a luminous tube, or from practically coexisting.