Headlight performance has a lot more to do with design than just wattage, lumens, and light type. I had a Jeep Wrangler and a BMW 335 before the Sport Trac. The Jeep seemed like two flashlights pointed down the road, while the BMW seemed to "light up the world," illuminating everything in my path equally, just where you wanted it. They even turned to follow the road as I entered a curve.
I researched the web, and got the best replacements for the Jeep (I believe Sylvannia Silverstars, but I can't remember), and it seemed like I had 2 brighter flashlights pointed down the road. But the jeep never performed like the BMW. It would have taken more than lumens; it would have taken superior design of the light direction, filtering, color, etc.