Patent ID: 6841937

Claim:
An electric lamp which is provided with an electric light source in a light-transmitting bulb provided with a coating consisting essentially of an inorganic colored pigment selected from the group formed by oxide nitride pigments of the general formula A 1−x A′ x BO 2−x N 1+x , wherein A=Mg, Ca, Sr, Ba, Zn, A′=Ln, Bi, Al, Fe, B=V, Nb, Ta, Mo, W and B′=Ti, Zr, Hf, Sn, Ge, Si, Nb, Ta and 0<x<1 or an oxide-nitride pigment of the general formula AB 1−x B′ x BO 1+x N 2−x , wherein A=Mg, Ca, Sr, Ba, Zn, A′=Ln, Bi, Al, Fe, B=V, Nb, Ta, Mo, W and B′=Ti, Zr, Hf, Sn, Ge, Si, Nb, Ta and 0<x<1 or an oxide-nitride pigment of the general formula A y A′ 2−y B 2 O 5+y N 2−y , wherein A =Mg, Ca, Sr, Ba, Zn, A′=Ln, Bi, Al, Fe, B=V, Nb, Ta, Mo, W and B′=Ti, Zr, Hf, Sn, Ge, Si, Nb, Ta and 0<y<2 or an oxide-nitride pigment of the general formula A′ 2 B 2−y B′ y O 5+y N 2−y , wherein A=Mg, Ca, Sr, Ba, Zn, A′=Ln, Bi, Al, Fe, B=V, Nb, Ta, Mo, W and B′=Ti, Zr, Hf, Sn, Ge, Si, Nb, Ta and 0<y<2 or an oxide-nitride pigment of the general formula CD 2−m D′ m O 4−m N m , wherein C=Mg, Ca, Mn, Fe, Co, Ni, Zn and D=Al, Ga, In, Ti, V, Cr, Fe, Co, Ni and D′=Ti, Zr, HF, Sn, Ge, Si, Nb, Ta, and 0<m<2 or an oxide-nitride pigment of the general formula C 1−n C′ n D 2 O 4−n N n , wherein C=Mg, Ca, Mn, Fe, Co, Ni, Zn, C′=Al , Ga, In, Ti, V, Cr, Fe, Co, Ni, D=Al, Ga, In, Ti, V, Cr, Fe, Co, Ni and 0<n<2 or an oxide-nitride pigment of the general formula A′ 2 CBO 5 N, wherein A′=Ln, Bi, Al, Fe, C=Mg, Ca, Mn, Fe, Co, Ni, Zn, B=V, Nb, Ta, Mo, W or an oxide-nitride pigment of the general formula A′ 2 A″BO 4 N 2 , wherein A′=Ln, Bi, Al, Fe, A″=Ln, Bi, B=V, Nb, Ta, Mo, W or an oxide-nitride pigment of the general formula A′ 2 DBO 3 N 3 , wherein A′=Ln, Bi, Al, Fe, D=Al, Ga, In, Ti, V, Cr, Fe, Co, Ni and B=V, Nb, Ta, Mo, W and with means for operating the electric light source.