Focusing the H4 low beam...

[RJN2112]

Has anyone tried to improve the light pattern from the H4 side, after they have gone to the dual low configuration?

The H7 on the left in this image has a shorter spacing between the base plate and the center of the element (red line). I referenced this photo to the low beam elements..... Laid up side by side, an H4 bulb's low beam element is 'forward' of the H7 by 1/4". Base plae is mounted to the bulb body further 'back'. 1.375" (green lines) compared to 1.125" (blue lines)

If the reflector is the same geometric shape (just 'flipped'-- easy to do in CAD, with the bulb mounting point being an identical distance back from the focal point) the H4 low pattern will be more diffuse.

I know folks have modified H4 bulbs to fit the H7 (H7/H4)socket on the left.... I don't know if the pattern of light stays just as diffused, or not. The process involves trimming away part of the H4 base, to fit the smaller size H7 opening in the left reflector housing. That would move the low beam element 'back' relative to an H4 standard bulb, roughly 1/4"......

I don't want to go that route, if I reduce the effectiveness of the OEM low beam. If I can improve on the pattern made by the OEM H4, by shimming the H4 bulb 1/4"....... that may sharpen up the light from the right low beam.

Do you know if anyone has tried that?