I do think that it helps to aim them down slightly from where the stock headlights are aimed. Not that I get flashed or think the hot spot will go away, just that the stock headlights are aimed a little higher than necessary when upgrading to these brighter units. Aiming down helps to focus the light immediately ahead where you'll need it.
Here is the proper way to aim headlights...
(Copied and pasted my own response from another thread on another forum)
1) park your jeep where your headlight is 20' away from a wall on level ground.
2) measure (at the jeep) the height of the center point (bulb) of the headlight to the floor. Record measurement.
3) go to the wall with your headlights on, and mark out the same height from step 2 but subtract 2". Make a tape line.
4) adjust headlights to hit that tape line.
Done.
Your original headlight aim is irrelevant. Same goes for lifted vehicles, the original center point on the wall is irrelevant.
A little graphic so people understand why the method most commonly used and circulated on the net is incorrect.
Since the trucklites don't have a super sharp cutoff like my HIDs for instance...
use the hottest part of the beam as your gauge, maybe 1/2" above the hottest part even