Efficiency arc discharge lamp

Electric discharge lamp apparatus for light source of automotive

Electric incandescent lamp

Electric incandescent lamp

Electric incandescent lamp having truncated conical filament and

Electric lamp

Electric lamp

Electric lamp

Electric lamp arrangement with reflector

Electric lamp having a strongly colored lamp envelope

Electric lamp having an envelope with a specular light-reflectiv

Electric lamp having an outwardly extending protrusion

Electric lamp lamp vessel provided with a light-absorbing...

Electric lamp provided with an interference filter

Electric lamp vessel having a mirror coating with a sharply defi

Electric lamp with absorbing and interference media

Electric lamp with adhesion layer and interference layer

Electric lamp with ceramic reflector

Electric lamp with flexible cover holder

Electric lamp with light-absorbing medium and interference film