I finally got my D2R's into my JDM's and....
Strange, my JDM's are exactly the same as my USDM's. Here is what I noticed about D2R's rebased to H4H.....
First off, there is NO way a H4 bulb or H4 HID kit can be made to fit without major rework into the H4H housing. Just thought I would clear that up since in H4H threads I ocassionally see people saying H4's can be slightly modded to replace H4H. Not even close.
JDM's make ALOT of RIGHT-HAND flare!! Because I used a USDM D2R bulb (it is shielded at 3:30 and 9:30) I think it negated the left-hand flare of JDM's. My beams are staright ahead, but my right hand flare is just as bad as my USDM's with corrected 9006 HID kit.
On ground performance is same as USDM. I used 4100K Phillips bulbs, so light output is whicked and medium range, with typical hotspots in front of the car. I have a good cut-off similar to halogen, but the optics are over-saturated with intense light. So, basically I am surprised people don't flash me, because EVERYTHING about my headlights is whicked bright, even looking at the reflection of light in my bumper is retina burning. I do have good beam because 90% of the light is on the road, but all the scatter is probably excessive.
I have shielded the lamps in my 2nd attempt. I shielded completely from 2:45 to 9:15 to eliminate side flare, and I would say side flare is controlled, and the glare overall was cut by 50%. Pretty much as good as it gets. Also, I painted the shield flat black, so now my headlamp color has no more yellow from the lamp dopant, which colors the lower part of the bulb's output yellow. Now the light output is a very pleasing mostly white, tint of purple light, as it should be.
Anyway, I basically have halogen beam pattern that is bright as he77. Time to move on to bi-xenons. I bought a set of bi-xenons.
If anyone wants 4100K Phillips HID and Hella ballast, make me offer. The lamps are professionally rebased. I had a machine shop machine the bases off of my H4H bulbs and re-machine the D2R base to accept them. less than 20 hours on kit by the time my bi-xenons are in. Yes, they are beam corrected and even shielded, no one else can say that about their H4H HID's!!