what are you, a fucking physicist or something?? oh wait, i just checked your sig, and it says you're 21--never mind.
let me put it to you this way:
1) driving GTO with normal factory headlights--difficult to see things on the road at night (street signs, people on the side of the road, etc. etc.)
2) adjust beams of factory headlights to aim a bit higher (at the suggestion of members of ls1gto.com, who fully admit and are aware that the stock headlights suck)--a little bit better, but still shitty (free mod)
3) swap in slightly higher output bulbs (actually, these bulbs are the same as the ones in the "high beam" housing) and shut off the daytime running lights so as not to burn the bulbs out prematurely--again, at the suggestion of the gto site. somewhat improved, i'm actually happy with the outcome, and willing to let things be. ($15 mod)
BUT.............
4) group buy comes across the site (ls1gto.com) from an established vendor for HID kits with a lifetime warranty, and a harness included to provide extra power from the battery so that the lights don't occasionally 'flicker', which can happen with 'non-factory' high output headlights. kit was $200 (in other words relatively cheap for me), easy to install, and provided the car with absolute blinding light. i can see all the fucking way down my street at night now. and i drive the car at times when there's not too many people on the road.
so to answer your question, the bulbs and light output are far, far superior to the factory units.