After much research and use of Silverstars myself, u get more light outta your stock bulbs than any of those after market bulbs, they are less lumens, just a whiter light, and its for sure not thrown farther down the road, thats a crock of s**t lol i think u need to do a comparision pic of ur old bulbs dude,
ur best bet for more light is HIDs, if u cant afford it, for around 5-60 bucks u can do HIR bulbs, i dont know a whole lot about them, but they produce upwards of 2500lumens, thats wat most 6000k bulbs will do on HIDs
Not very many places to get them, but ill keep looking, one guy sells them on ebay at the moment, ive been told john deer as well, but they are more there