Mihalis, just fyi, running drl will significantly reduce the lifespan of a clear headlamp body lens. You will see yellowing of the outside lens much sooner than a lens that only uses light at night. Lens polish can get rid of light yellowing and sanding can cure heavy yellowing, but once you sand or polish a lens, you remove the UV coating, and will then have to polish every month. Just something to consider. Lens yellowing is caused by the heated lens reacting to dust/dirt outside, temp difference between outside lens and inside warm lens, and not washing the lamp will exacerbate / expedite the problem. Sorry to be long winded. Just a consideration in using illumination during the day.