My biased two cents ...
No issues at all. In fact while the light looks draggy, I don't notice it at all.
A really big benefit of the location is reflected light off the belly provides a
LOT of ground illumination. I have three lights on it, the big center one and
the two smaller ones. I have them angled such that the big one illuminates
the runway that I can see just over the nose on final with one notch of
flaperons. The two smaller ones help with close up illumination (they are
fog lights).
I don't care what kind of lights you put in the wingtips, they will never
provide the illumination you get from reflected light off the belly when you
land ... I'm surprised frankly that Kitfox never made a kit for detachable
light bar as an option ... (John?)
I adjusted them by putting tail on a sawhorse at roughly wheel landing attitude and using a hangar building in the distance as an adjustment
target.
I can install the light bar in less time than typing this post ....
Jeff