Lamp with controllable spectrum

An area illumination inorganic electro-luminescent device with a General Color Rendering Index of 80 or greater, comprising:

• a. a substrate;
• b. one or more commonly addressed, light-emitting elements, each commonly-addressed, light-emitting element including:
• b1) a first electrode layer formed over the substrate,
• b2) one or more light-emitting layers formed over the first electrode layer, and
• b3) a second electrode layer formed over the light-emitting layer;
• c. wherein the one or more light-emitting layers include five or more different distributions of different core/shell quantum dot emitters, each distribution of different core/shell quantum dot emitters emitting a different colored light having a spectral power distribution, each spectral power distribution including a peak wavelength and a FWHM bandwidth and wherein the peak wavelengths of the spectral power distributions of light produced by at least two of the five or more different distributions of different core/shell dot emitters are separated by a distance between the peak wavelengths such that the minimum of the separation distances between any two peak wavelengths of the respective spectral power distributions is less than or equal to 1.1 times the average FWHM bandwidth between 460 and 670 nm, and such that the electro-luminescent device produces white light having a General Color Rendering Index of 80 or greater;
• and
• d. wherein the five or more different distributions of different core/shell quantum dot emitters are in a common light-emitting layer.