I wouldn't believe it if I weren't seeing it. I had a low beam go out on me so I went to Advance auto parts to pick up a spare. While there, I noticed the 9006 XL (Extra Life). I ask the guy if it is brighter. He says no but lasts longer. I give an eye to the Cool Blue bulbs. He says a little brighter but suggested the Silver Star. It is a Sylvania bulb 9006ST. I came home and put them in and it makes a big difference in lighting. They are the brightest legal bulbs according to the packaging and has the nicest glow when driving. Just my two cents worth. If anybody is looking for a brighter bulb, this may be the one for you.
Isiah 90 735il
BTW-They were $24.99 each. (they had better be brighter)