thats addressed in the link i believe because you would need to do a full retrofit to use 9007
you seem to be missing the point... he's doing HID... which uses an electronic ballast, at first i thought he bought the
whole hid kit, but now i see he already has a HID ballast (hella), which just requires you to either use a harness adapter so that you dont have to hack the stock harness, or use some sort of relay harness. the plug for the hella ballasts arent 9004/9007 style connectors anyways.
for sure man take a look at it at home, they seem to be brigter than 9004
it wouldnt matter when it comes to HID for the reason being is the bulbs are basically the same. 9004 vs 9007
HID, with all other being equal (manufacturer, kelvin temp rating), there is going to be no difference in brightness, (with halogen, yes there is.. but not with HID)
ncsi, as far as the ebay black housing one pieces... are they the regular ones or the projector style? i believe there are some retrofits using the regular black housings.
also as for the bulbs, since they're aftermarket they'll use either standard AMP/KET connectors.... you'll need adapters for them to connect to your hella ballast.
something like this
that takes the male P32-d base (goes to your OEM ballasts) to an AMP connector (aftermarket bulb)
i was basically going to do the same retrofit you're doing with aftermarket housings, FX35 projectors with TSX lenses.
i figured messing with my JDM 1pieces to get the lense clear would be too much work.
post up on how everything comes along once you do the retrofit... im curious to see how the fitment is with the FX projectors in those housings.