OK folks, here's the latest update on this. The driveway was dry (albeit freeken cold) tonight so I pulled the feejer out and unplugged the left side bulb's solenoid connector (that acuates the telescopic action) while in the low position to get a feel for what one might expect with one (left side) low only bulb and one (right side) telescopic Hi/Lo HID bulb installed. I think for most of us mere mortals (non desert, night-time running jackal types) this is a big improvement.
1st picture is two HIDs at low beam (repeat prior experiment with better aim forward than before):
Now, here was the 2 HID headlights in high beam (from before) Note again the remarkable loss of intensity low down and on the ground. :
And now here is what the beam pattern looks like with the left beam in Low and the right in High Beam (just by disconnecting the connector going to the left solenoid for the Hi/LO)
Note: much better fill in the foreground and still good intensity up at the horizon. I believe that this could be improved even further with the use of an actual dedicated "Low Beam Only" capsule. The alternative would be to put a switch on the dash to allow the left side to change when desired or just leave in the low beam position when desired. I haven't worked out the details on that, but I don't think it would be terribly difficult if so desired, even as just a prototype.
The only thing that I'm not sure of is which side should be the "always low beam". Initially I assumed (yes, *** U me) that the side closest to oncoming traffic would be best to be left in low, but perhaps this is not so. If you look at the last picture there is some dropout to the outside right that would be kind of nice to get better illuminated when cranking along at night (catch a few more kamikaze critters), but I'm not sure if it would be worth losing the light on the left side.
Then again, I have never intended this to be a replacement for the Aux light prairie burners that light up the night with the eyes of god, just a reasonable upgrade for the rest of us poor slobs.
More to come...