I have had my Cibie 4 lamp system since `73 and have had them in four different cars and love `em. I have the big 130/100 watt lamps in them and couldn`t ask for any more light. Combined with my Cibie 175 driving lights with 130 watt bulbs you can go just about as fast as you want without overdriving them.
Depending on the amount of traffic where you live you can juggle the wattage of the lamps in the hi/low beams to avoid melting the retinas of oncoming drivers but these things have lead crystal lenses with a VERY precise beam pattern so they`re not a real hazard for other drivers if used responsibly.