Thread: D4 high-beam alignment

The lights aren't out by just a little, as when my vehicle is 3 mtrs from a wall, the halogen pattern is about 150 mm above the bi-xenon beam yet the halogen light is about 50 mm below the bi-xenon light. So in 3 mtrs the beam is already 200 mm higher, making it nearly 7 mtrs at 100 mtrs away - possum spotting for sure!

Originally Posted by gps-au

Makes you wonder if the lighting on the vehicle meets ADR's ?

Anyone willing to put their D4 over the pits at a motor registry ?

I just rang the NSW RTA techincal section and whilst there is a regulation requiring high beam to illuminate the road for at least 75 metres, IMO the bi-xenons achieve this. Hence not unroadworthy in NSW.

Originally Posted by Graeme

So in 3 mtrs the beam is already 200 mm higher, making it nearly 7 mtrs at 100 mtrs away - possum spotting for sure!

That is pretty close to what I saw when I put mine up against the wall. I was parked about 30-40 metres away, and I've have guessed it to be +/- 3 metres high. Will try to go out tonight and get a pic of the beam on the same wall - if successful will post here tomorrow.

So legally the halogens are just driving lights. Is there any regulation about fitting driving lights other than thay need to go off with the high beam?

I would still say they are not fit for the purpose.

I would expect a proper reaction from LR once LR UK investigate (look into?) the discrepancy.

Okay - so, I went back to the wall last night and took a couple of pics, in the hope of illustrating what I'm seeing. Firstly, some important measurements: I was parked 18 metres away from the wall; the wall itself was 24 metres wide (and the full width is shown in these two pictures), and the door you will see toward the right hand edge is a standard door height (around 2 metres). Lastly, where I was parked was about 200 mm below the bottom edge of the wall, so add this to the height you're seeing to get "real" height.

Before I go on - this is the first time I've uploaded images, so forgive me if they're dodgy. They were both well over 3 mb when uploaded, so should be clear enough. For those inexperienced in these things (like me) just click on the thumbnails to open a larger image in a new window.

Here's pic #1, with full high beam - both bi-xenons and halogens. You can clearly see the two different beams.

Both.jpg

And here's pic #2, with both bi-xenons well covered.

Halogen only.jpg

I'll leave it to others to interpret what this shows, but I will note that the bottom edge of the halogen beam appeared to strike this wall about 1.4 metres up, making it some 1.6 metres above ground level at the car. And the halogen beam spread the full width of the 24 metre wall - all of this from a range of 18 metres. This would mean that at 50 metres this beam would be about 4.4 metres above ground, and some 66 metres wide... Hmm - now, let's see - at 100 metres... Sheesh. Enough said.

Halogens are definately higher.

They should be about the same in high beam.

Anyone with a D3 have somwhere they can do the same?

My light pattern is consistent with your's Jesse B. Surely LR cannot ignore such a beam alignment discrepancy.