I am looking for a just the right light to use as an Ice Light. My 
thought is to illuminate the Pilot's wing leading edge to see id I am 
accumulating ice at night.
I think is will probably have to be turned on every so often for a 
visual check. So I will have a switch on the panel for it.

What I am thinking, is a narrow beam high output L.E.D.

Grayhawk had mentioned he once had one on one of his planes?

Yeah, Grayhawk had one on a Skymaster where one sits in front of the wing leading edge.  In a Lancair we sit back far enough that it is hard to see the initial ice formation on the wing leading edge.  Otherwise, something in the fuselage that shines down the wing - turn it on, if you don't like what you see, turn it off.  What about a view of the horizontal stab out of the rear window with a light shining down the h-stab leading edge?

 

Grayhawk doesn't like ice except in his gin.