Patent ID: 8004196

Claim:
A method of using glass for a lighting device for a background illumination, said method comprising the steps of: providing that the glass is an alkali-free aluminoborosilicate glass; using the glass as a glass casing body of the lighting device in applications with one of external and internal contacting of the lighting device for the background illumination; and selecting a glass composition of the glass from the following compositions: SiO 2 is 50-70 wt. % B 2 O 3 1-15 wt. % Al 2 O 3 1-25 wt. % P 2 O 5 >0-20 wt. % Σ Na 2 O + K 2 O is 0-<0.5 wt. % MgO 0-10 wt. % CaO 0-12 wt. % SrO 0-5 wt. % BaO 0-15 wt. % TiO 2 0-10 wt. % ZrO 2 0-3 wt. % CeO 2 0-5 wt. % Fe 2 O 3 0-1 wt. % WO 3 0-5 wt. % MoO 3 0-3 wt. % ZnO 0-5 wt. % Bi 2 O 3 0-5 wt. % SnO 2 0-2 wt. % as well as Rh, Hf, Ta, W, Re, Os, Ir, Pt, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu in oxidic form in contents of 0-5 wt. %, and at least one refining agent selected from chlorides, sulfates, As 2 O 3 and Sb 2 O 3 , with said glass composition being equally suitable for the lighting device with internal contacting and the lighting device with external contacting.