The lights are easily adjustable by loosening the screw and moving it up or down. If one only use these in the tips I would think of having on at 0 degrees and one at about 10 degrees down, with reference to the wing chord line.
Also keep in mind that the lenses are 10 degrees which on it's own is a nice spread.
Below is a picture where you can clearly see the adjustment screw and slot.
Approved Person nr 325
RV10 - ZU-XOX - (Flying)
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