When I first flew my 320 at night, the 100W GE 5109 imbedded in the PVC sewer pipe and glassed to the cowl did a beautiful job of illuminating the runway environment on the usual Lancair steepened approach.  Once the round-out started the light shone perfectly down the runway centerline.  Of course, I couldn't see over the nose to appreciate the light and, looking down and off to the left was as though peering into a black hole. 

 

It was about that time (circa 1997) someone in CA found a 100W reflectorized projector lamp (code to be supplied later) and a mount that could be bolted up to the leg.  Eureka!  Such a lamp and its' placement more than adequately lighted the black hole - even during taxi.  The only drawback seemed to be excessive heat generated whilst the gear leg was stowed with the light left on  - certainly enough heat to melt any wing icing in that area.  The simple solution was to make sure a set of contacts off the "gear down and locked" informational relay were used, along with "leg light" power switch (logical "and") before igniting the beam.

 

Additional benefits became obvious thru use.  Because the light was below the wing, there was no glare into the pilot's eyes although it is apparent that the prop is still spinning out front.  Lighting up the bottom of the plane make it far more visible at night - my friend Arnie has one on each leg and he looks like a 747 with the bottom showing at night.

 

I don't like HID lights on cars or planes since they are too bright and disturbing to anyone around them while they are on at night.

 

That's my free opinion - take it for what it's worth.  (Note that I am not using that $.02 nonsense.)