LED lighting apparatus having improved color rendering and LED filament

A lighting device, comprising:

• at least one light emitter configured to emit blue light;
• a green phosphor having an emission peak in a range of 500 nm to 550 nm;
• and
• a red phosphor having an emission peak in a range of 600 nm to 650 nm,
• wherein the green phosphor and the red phosphor have different full widths at half maximum, and the full width at half maximum of the green phosphor is longer than the full widths at half maximum of the red phosphor,
• wherein, in an emission spectrum, an intensity of light emitted from the lighting device is configured to increase from 500 nm to 600 nm, and
• wherein the intensity of light emitted from the lighting device at 700 nm is configured to be less than about 10% of the maximum intensity of light emitted from the lighting device.

A lighting device, comprising:

• at least one light emitter configured to emit blue light;
• a yellow phosphor having an emission peak in a range of 550 nm to 600 nm;
• and
• a red phosphor having an emission peak in a range of 600 nm to 650 nm,
• wherein the yellow phosphor and the red phosphor have different full widths at half maximum, and the full width at half maximum of the yellow phosphor is longer than the full widths at half maximum of the red phosphor,
• wherein, in an emission spectrum, an intensity of light emitted from the lighting device is configured to increase from 500 nm to 600 nm, and
• wherein the intensity of light emitted from the lighting device at 700 nm is configured to be less than about 10% of the maximum intensity of light emitted from the lighting device.