hi,im having a problem with the drivers side xenon on my 172 sport.first the bulbs looked 2 different colours so i replaced them with a pair of philips ultinons but the drivers side looks brighter but how can it be? could they be misaligned? And also the drivers side has decided to only work sometimes since i had the unit out,could this be the ballast pack? the joy's of owning a clio! thanks for your help.