Probably because it was done wrong, either because the procedure wasn't done correctly or because the headlamps aren't well enough focused to allow a good aim.
Nope, they're dim (blue internal bulb blocks a lot of light that would otherwise reach the road) and poorly focused (cruddy optics made on worn-out tooling). Not a good choice, despite Sylvania's heavy advertising hype. GE Night Hawks are much better (and less expensive). See here.
