Charlie,
I recently switched my RV-4 tips from Hoerner to Sheared. Previously I had Bob DeBorde landing and taxi lights in my wingtips with triple lights (Nav/tail/strobe) on the outside.
With the sheared tips, I used the Creative Air landing and taxi lights along with the triple lights all located under the lens (as opposed to hanging out in the air stream like before) The aft (tail) light portion of the triple light is useless in the forward tip, but I didn't want to cut a perfectly good light, so I cut a clearance hole in the aft fiberglass bulkhead of the wingtip and slid the triple light back into the hole. The nav and strobe portion of the triple light are now all that shows. It turns out that it was possible to locate the triple light high enough and the landing light low enough to eliminate almost all blockage. Since I now did not have aft white lighting, I decided to try something different and embedded 10 white LEDs in the trailing edge of each wing tip just for fun. To be legal, I will still have to add a strobe to the tail since the strobes under the lenses do not provide enough coverage.
As far as performance, the creative-air lights are 75 watts as opposed to my old 100 watt units. The light they produce is adequate, but certainly not overpowering. I believe the design driver on these units was more in keeping the units compact than powerful. Still, I am satisfied with them.