Patent ID: 8350460

Claim:
A phosphor coating for Hg low-pressure discharge lamps with a phosphor composition consisting of: a green phosphor emitting in the green spectral region; a red phosphor emitting in the red spectral region; and a further phosphor emitting in the yellow spectral region, wherein the further phosphor absorbs UV Hg and Hg Vis radiation and has an emission maximum at a wavelength greater than 520 nm; wherein cerium magnesium aluminate doped with terbium (CeMgAl 11 O 19 :Tb or CAT), lanthanum phosphate doped with cerium and terbium (LaPO 4 :Ce, Tb or LAP) or cerium gadolinium magnesium pentaborate doped with terbium ((Ce, Gd, Tb)MgB 5 O 10 or CBT) is used as the green phosphor; and wherein yttrium oxide doped with europium (Y 2 O 3 :Eu or YOE or L581) or germanium zinc magnesium pentaborate (GeZnMgB 5 O 10 :Ce, Mn or L165) is used as the red phosphor.