A light projection system and method for generating an image with three primary colors having a module of first blue lasers, second lasers and a wavelength conversion element configured to emit light at a plurality of wavelengths after absorption of a light beam from the second lasers at an excitation wavelength, the output of the module being a combined light beam having a pre-defined chromaticity where the projector is calibrated so as to provide the pre-defined chromaticity of the combined beam over at least a range of laser drive current values to correct for non-linear performance of the wavelength conversion element.