Needed to be dimmed about half, which kinda makes sence. The number plate lights have 12v going to them the outers when side lights have 6v then when braking has 12v going to them. If you are using standard units and want to keep them standard using black adhesive would look pants. Only thing to do is try and find red adhesive (if you do please let us know) or clear adhesive. If your going to convert your standard into tinted then use black adhesive but make sure you've removed all remnants of the old red glue on the lens