Join Date: Oct 2007
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The ballasts are digital so to be honest they'd tend to either work or not work. It digitally controls the output to stay around 85V AC when warm.
To be honest are you sure they are dull? I know some halogen lights on the newer cars are pretty efficient these days, and they tend to look brighter on the ground.
Currently in AndrewM's garage:
Renault Laguna 1.9 dCi Dynamique