A lighting device comprising: a first group of solid state light emitters comprising at least one solid state light emitter; a first luminescent material; and a second luminescent material; wherein: if electricity is supplied to said first group of solid state light emitters, said first group of solid state light emitters would emit light having a peak wavelength in the ultraviolet range, wherein ultraviolet is defined as having a wavelength between 100 nm and 400 nm; said first luminescent material, if excited, would emit light having a dominant wavelength in the range of from about 430 nm to about 480 nm; said second luminescent material, if excited, would emit light having a dominant wavelength in the range of from about 555 nm to about 585 nm; if said first luminescent material is excited and said second luminescent material is excited, a mixture of light emitted from said lighting device which was emitted by said first luminescent material and light emitted from said lighting device which was emitted by said second luminescent material would, in the absence of any additional light, have a mixed illumination having x, y color coordinates which define a point which is within an area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third, fourth and fifth line segments, said first line segment connecting a first point to a second point, said second line segment connecting said second point to a third point, said third line segment connecting said third point to a fourth point, said fourth line segment connecting said fourth point to a fifth point, and said fifth line segment connecting said fifth point to said first point, said first point having x, y coordinates of 0.32, 0.40, said second point having x, y coordinates of 0.36, 0.48, said third point having x, y coordinates of 0.43, 0.45, said fourth point having x, y coordinates of 0.42, 0.42, and said fifth point having x, y coordinates of 0.36, 0.38. a first group of solid state light emitters comprising at least one solid state light emitter; a first luminescent material; and a second luminescent material; if electricity is supplied to said first group of solid state light emitters, said first group of solid state light emitters would emit light having a peak wavelength in the ultraviolet range, wherein ultraviolet is defined as having a wavelength between 100 nm and 400 nm; said first luminescent material, if excited, would emit light having a dominant wavelength in the range of from about 430 nm to about 480 nm; said second luminescent material, if excited, would emit light having a dominant wavelength in the range of from about 555 nm to about 585 nm; if said first luminescent material is excited and said second luminescent material is excited, a mixture of light emitted from said lighting device which was emitted by said first luminescent material and light emitted from said lighting device which was emitted by said second luminescent material would, in the absence of any additional light, have a mixed illumination having x, y color coordinates which define a point which is within an area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third, fourth and fifth line segments, said first line segment connecting a first point to a second point, said second line segment connecting said second point to a third point, said third line segment connecting said third point to a fourth point, said fourth line segment connecting said fourth point to a fifth point, and said fifth line segment connecting said fifth point to said first point, said first point having x, y coordinates of 0.32, 0.40, said second point having x, y coordinates of 0.36, 0.48, said third point having x, y coordinates of 0.43, 0.45, said fourth point having x, y coordinates of 0.42, 0.42, and said fifth point having x, y coordinates of 0.36, 0.38.