Abstract: A light emitting device with a tunable light emission spectrum includes one or more blue LEDs in optical communication with n different red phosphor compositions. Each of the n different red phosphor compositions includes a different amount of strontium (Sr) and comprises light emission in a wavelength range from about 600 nm to about 675 nm. Each of the blue LEDs comprises light emission in a wavelength range from about 400 nm to about 475 nm. An mth different red phosphor composition has a formula Ca1-x-ySrxEuyAlSiN3, with 0<x<1 and 0<y<1, and x=xm and 1?m?n. A light emission spectrum of the light emitting device comprises a blue spectral component from the one or more blue LEDs and a red spectral component from the n different red phosphor compositions, where the red spectral component comprises n overlapping light emission profiles each having a different peak emission wavelength ?m.

Abstract: Provided according to embodiments of the invention are methods of making a Ca1-x-ySrxEuyAlSiN3 phosphor composition that include selecting a Color Rendering Index (CRI) R9 value, determining an Eu concentration based on predetermined values to obtain the selected CRI R9 value and making the Cai-x-ySrxEuyAlSiN3 phosphor having the determined Eu concentration. Also provided are methods for determining concentrations of Eu in a Cai-x-ySrxEuyAlSiN3 phosphor that will achieve a CRI R9 value. Related computer products are also disclosed.

Abstract: Provided according to embodiments of the invention are methods of making a Ca1-x-ySrxEuyAlSiN3 phosphor composition that include selecting a relative color point; determining Eu and Sr concentrations based on predetermined values to obtain the selected relative color point; and making the Ca1-x-ySrxEuyAlSiN3 phosphor having the determined Eu and Sr concentrations. Also provided are methods for determining concentrations of Sr and Eu in a Ca1-x-ySrxEuyAlSiN3 phosphor that will achieve a relative color point. Related computer products are also disclosed.

Abstract: Provided according to embodiments of the invention are method of coating a phosphor that include contacting the phosphor with a sol comprising at least one of silica, alumina, borate and a precursor thereof, to form a coating on the phosphor; and heating the phosphor. Also provided are phosphors that are coated with alumina, silica and/or borate, and light emitting devices that include such phosphors.

Abstract: Provided according to embodiments of the invention are phosphor compositions that include Ca1-x-ySrxEuyAlSiN3, wherein x is in a range of 0.50 to 0.99 and y is less than 0.013. Also provided according to embodiments of the invention are phosphor compositions that include Ca1-x-ySrxEuyAlSiN3, wherein x is in a range of 0.70 to 0.99 and y is in a range of 0.001 and 0.025. Also provided are methods of making phosphors and light emitting devices that include a phosphor composition according to an embodiment of the invention.

Abstract: A method of determining lighting contributions of elements of a lighting component includes obtaining optical data representative of light output of the lighting component. Relative intensity data may be calculated from the optical data, and may indicate intensity differences in the light output of the lighting component as compared to that of a reference component. An optical property of an element of the lighting component is determined based on a comparison of the optical data with that of the reference component, where the reference component includes at least one reference element. Related systems and apparatus are also discussed.