The light produced by a xenon bulb is not in fact blue,but white falling well with the international speciafication for white light.The light only appears blue compared to the warmer yellow light produced by halogen lamps.It clearly appears white when compared to day light .However with the introduction of certain crystals ,it is possible to Create a stronger blue tint which gives a more distinct look to your headlights.If you want the stronger blue tint then please select the 8000k system.