perhaps he was talking about the glare that the opposing traffic would experience because of the extra output of light?...i've heard that since the stock housings weren't created with the intention of directing the output of HID's they spread the light more than they should, creating glare for the opposing traffic....that's the rumor i've heard...not sure of the validity of it...since there were only two bulbs included i would assume that they take the place of the high beams?...i assuming this is true, the HID's wouldn't even be seen by opposing traffic because it's just rude to high beam people...that's my 2 cents...looks great though, and i'm half tempted to buy myself a set!