Patent ID: 8067322

Claim:
A glass composition for lamps, substantially comprising the following that are expressed in terms of oxides: SiO 2 :60-75 wt %; CeO 2 +Ce 2 O 3 :0.08-0.3 wt %; SnO+SnO 2 :0.01-5.2 wt %; Al 2 O 3 :0.5-6 wt %; B 2 O 3 :0-5 wt %; Li 2 O+Na 2 O+K 2 O:13-20 wt %; MgO:0.5-5 wt %; CaO:1-10 wt %; SrO:0-10 wt %; BaO:0-10 wt %; ZnO:0-10 wt %; Fe 2 O 3 +FeO:0.04-0.1 wt %; and TiO 2 :0-1 wt %.