I have the Cyo which supposedly has the same beam as the Edelux.
Basically I put the bike on a flat surface, point it at something like a garage door, and adjust the light so the "horizon" on the light is about at a persons waist level. I would like it a little higher and I've played around with it, but then I end up hitting people in the face with the beam, and "waist level" works well enough.
I'm honestly surprised to hear that it gets to dim if it gets far away - it's supposed to be even brighter than the Cyo, and the Cyo is bright enough (and I'm picky) for everything except when it's raining on new, sheer black pavement, pretty much no matter how high I aim it (well within reason).