Originally Posted by
Marcus_Ti
Number of lumens is entirely dependent on your surroundings.
^^^This. It would be a lot more useful if headlight manufacturers spec'd their products in foot-lamberts rather than lumens. (In layman's terms: lumens is the amount of light exiting the lamp; foot-lamberts is the amount of light that actually reaches the surface you're trying to illuminate.) But of course then they'd have to standardize their test procedures and it could get harder to fudge the numbers!