Okay, this thread is an off shoot of this thread:
Basically this thread is to discuss and compare mounting options, in light of some recent testing.
I just did a quick check on an AL and LI head, and both have a definite horizontal pattern to them.
It's actually looks kinda like a rectangle. i'll work on some actual pics and vids, as this was a quick test.
On a prior test i did, the Li's out performed my AL's on my motorcycle:
I'm going to redo the test with the AL's mounted vertically, and i'll post results shortly.