make sure the screen glass is clear of streaks and scratches, make sure it has not delaminated causing it to permanently fog and there are no oils on it. If you are seeing starlets of light scattering through the windshield no amount of wattage in the headlamps will help.
If you have a problem in slow reaction of your eyes iris like me get some proper night driving glasses, they are slightly dark tinted and provide glare control to such scattering light. Only a handful opticians know of these glasses in Karachi (where I am from). most just try to sell you fake frames.