Based on Mie scattering theory,the phosphor particle's scattering effect were simulated including light excitation and absorption. The light intensity proportion changes of forward and backward scattering light with different white light emitting diode(LED) color temperature were calculated.We also analyzed the phosphor particle size effecting the luminous flux of white LED and light color distribution of angle.Devices' excitation and emission spectrums used in our simulation were real measured spectrums of...