For many people, $15 lights are fine. My commute only has a very short unlit section and its a very wide and easy to follow path, so the lack of an adjustable beam setting is no big deal.

Of course, that means that I absolutely must adjust the fitting to "permanently low beam" rather than "permanently blinding", if for no other reason that I don't want to get flattened by an oncoming car I've just dazzled...