Cibie is in business. There's just very few retailers in the US. But the Z-beams are no longer produced so are hard to find.
With any H4 lamp assembly, the design and quality of the housing
and the bulb can make a big difference on whether the light produced is effectively placed on the road. And IMO, there are also personal preferences based on things like where you drive and how tolerant your eyes are for contrast and things like that. Living in a part of the country with lots of wooded twisty roads and undulations puts a slightly different priority on things than the high desert. Anyway my point was even a good lamp will not perform well with a poor bulb. "Hilldweller" did some comparison measurements of lumens at set locations on the road using the same Hella lamps and two different bulbs. With the Delta Blue 'Xenon' bulb it wasn't much better (in lumens at the test locations ) than a plain old sealed beam. His tests also showed a couple of the new LED lamps are very good. Personally I don't like the contrast, but they are bright, and legal. The good ones are not cheap.
chart and links 1/2 way down this page:
Headlights
Aiming
For a single pair of combined Hi/low lamps, aim them using the low beams. (The high beam instructions are for cars that have a dedicated pair of high beam only lamps.)
For DOT or SAE marked headlight
aiming without a machine.
For lamps made to European Commission standards, use
E-code headlight aiming
