Patent ID: 7315125

Claim:
A fluorescent lamp comprising a lamp glass, said lamp glass consisting of an aluminum-free borosilicate glass, said aluminum-free borosilicate glass having chemical resistance and a composition, in percent by weight, based on oxide content, of: SiO 2 60-78 B 2 O 3 7-20 Li 2 O 0-2 Na 2 O 0-4 K 2 O 3-12 MgO 0-2 CaO 0-2 with MgO + CaO 0-3 BaO 0-3 ZnO 0-2 ZrO 2 0.8-12 TiO 2 0-10 CeO 2 0-1 F − 0-0.6 and optionally at least one refining agent in a standard amount for refining.