What headlights? His profile states he doesn't have a car yet.
Jared, The brightness is primarily determined by the separate and replaceable bulb in the lens housing. A higher wattage will be brighter, but will probably not last as long, as a lower wattage bulb.
The pattern of that light is determined by the reflector, the lens, and the condition of them. A lens pitted by years of road rash will disperse the light from the bulb to areas other than the road in front of you. A new housing with lens will restore much of that concentration of the available light where it will do the most benefit. A new housing with a poorly designed reflector and lens will be no better, maybe much worse, at night even though the crystal clear lens looks better in the day.
"See well" and "look good" are not synonyms.