The continuing research efforts in white light created by mixing red, green and blue light emitting diodes (RGB LED)
will allow their applications in high quality lighting systems in the (near) future. There are still many issues to tackle in
this kind of light source, for instance the color uniformity and the change of color-render property owing to the change of
LED's temperature. In this paper we simulate the effects on color uniformity of the near-field light distribution due to
different LED-chips arrays (at optimum packaging density for uniform irradiance) using High-Power RGB LED-chips.
The results showing the color uniformity of near-field which can be achieved with different RGB LED-chips arrays are
presented. Several configurations of RGB LED-chips arrays and relevant data for color variation are given respectively.
An analysis of luminous efficacy of radiation (LER) and color rendering index (CRI) of this source is performed, which
are affected by the peak wavelength, spectral width, and the output peak emission power ratio of LED-chips.