Encapsulating package for white light LED

A light-transmissive encapsulating package configured to encapsulate an LED die, the encapsulating package comprising:

• a light-transmissive bulk encapsulating material;
• phosphors blended into the bulk encapsulating material for white light emission;
• and
• a notch-filtering filter material that is blended into the bulk encapsulating material and comprises NdOxCly.zH2O, in which x and y and z are positive real numbers and the Nd is in a third oxidation state.

An LED module comprising:

• an LED die;
• and
• a light-transmissive encapsulating package that encapsulates the LED die and that comprises:
• a light-transmissive bulk encapsulating material;
• a yellow-emitting phosphor that:
• is blended into the bulk encapsulating material,
• is present in the range 0.5% to 5% by volume of the encapsulating package, and
• is present in the form of particles having a size in the range 0.5 um to 100 um;
• a red-emitting phosphor that:
• is blended into the bulk encapsulating material,
• is present in the range 0.5% to 5% by volume of the encapsulating package, and
• is present in the form of particles having a size in the range 0.5 um to 100 um;
• and
• a notch-filtering filter material that:
• is blended into the bulk encapsulating material,
• comprises NdOxCly.zH2O in which x and y and z are non-zero positive real numbers,
• has an absorption peak at a wavelength in the range 580-600 nm,
• is present at a concentration in the range 0.5-3.0% by volume of bulk encapsulating package,
• is present in the form of particles having a size in the range 0.5 um to 100 um,
• has a refractive index in the range 1.55-1.80,
• is present at a concentration configured to yield
• a color rendering index (CRI) of light emitted by the LED of at least 80,
• a lumens-per-watt (LPW) of at least 80, wherein the LPW equals the number of lumens emitted by the LED module divided by the number of electrical watts consumed by the LED module, and
• a multiplication-product of the CRI times the LPW that is greater than for any other possible concentration of the filter material in the bulk encapsulating package.