flikering

Hi people Dont know if anyone will now the answer to this but here we go. Well i fitted some 8000k HIDs i brought from america a few months ago. They are fine and would recommend them to anyone but i have noticed when sitting in traffic they flicker. It seems to be only once and doesnt...

As the name states...they were fine to begin with but have just realised that there flickering quite bad. Only had them about 3 weeks. i brought them along with some for the interior which are fine. any clues guys and gals?:confused: