Abstract: Lamps exhibiting a chromaticity shift relative to a clear baseline, including but not limited to modified spectrum lamps. Such a lamp includes a light-transmissive envelope and a light-generating element enclosed within the light-transmissive envelope. The light-transmissive envelope is doped to contain neodymium oxide and has a coating on its interior envelope surface that contains at least one color pigment. Visible light emitted by the light-generating element has chromaticity coordinates corresponding to a clear center of a clear baseline lamp. The light-transmissive glass envelope has a neodymium oxide content and the coating has a color pigment content that in combination cause visible light emitted through the light-transmissive envelope to have chromaticity coordinates that are shifted from the chromaticity coordinates of the visible light emitted by the light-generating element.