The LED housing is much sleeker and nicer looking, expensive and a fair amount of work to install. Bulbs are much cheaper and easier. With that being said the upgraded reflector housing is designed in conjunction with it's own LED bulbs. Putting in aftermarket LED is technically illegal in a halogen housing, but if you put in high quality bulbs that are designed properly they will have just as sharp of cutoff as the original halogens, mine did. I have not been flashed one time in two months of operating them, and the light output is phenomenal. The GTR's are great with a lifetime warranty, this is what I paid for, (they are pricey). There are other good ones on the market as well, just avoid Amazon for this purchase.