LED apparatus employing tunable color filtering using multiple neodymium and fluorine compounds

An apparatus comprising:

• at least one light emitting diode (LED) module, configured to generate a visible light;
• a phosphor;
• and
• at least one component comprising two or more compounds, wherein at least one of the two or more compounds comprises Nd2O3, and wherein at least another one of the two or more compounds comprises a neodymium oxyfluoride having formula of Nd1OxFy where 2x+y=3 or a neodymium hydroxide fluoride having formula Nd(OH)aFb where a+b=3,
• the at least one component being configured to provide a desired light spectrum by filtering the generated visible light using the two or more compounds,
• wherein a color of the desired light spectrum in a color space is determined by relative amounts of the two or more compounds in the at least one component, and
• wherein the at least one component-comprises more amount of the neodymium oxyfluoride having formula of Nd1OxFy where 2x+y=3 or the neodymium hydroxide fluoride having formula Nd(OH)aFb where a+b=3 than the amount Nd2O3.