An illumination system, useful for generating illumination light in an
image-projection system, has at least a first image-forming panel. A
first array of light emitting elements, for example light emitting diodes
(LEDs), generates a first light beam associated with a first wavelength
range. A second array of light emitting elements generates a second light
beam associated with a second wavelength range. The second array of light
emitting elements comprises at least a first light emitting element
generating light in the second wavelength range and a second light
emitting element generating light in the first wavelength range. The
center wavelength of the second light emitting element may be closer in
value to the center wavelength of a light emitting element in the first
array than to the center wavelength of the first light emitting element.