Mine was dim aswell, so i cleaned all the terminals and especialy the inside of the glass, i used maguires plastic polish cracking stuff it is, my light is still slow to light to full power but is fine when it gets their now much better infact since i cleaned the glass reckon it was that all along, iv'e chucked them in the dish washer before with good effects not the electrics tho might blow up
All disclaimers count as i know nothing
BUY A V6er i like my affair with the petrol pump