JIm Weir,
I noted your article in the current issue of KP on LEDs.

I have purchased a small quanity of these. hard to find as they were
recalled - lens were coming off in production. 160 lm @ 1000ma
http://lumileds.com/pdfs/DS60.pdf
My plans are to create a Rudder TE light bar and strobe them.
Currently on the shelf with another project ahead of it.
Jim Heffelfinger
Sacramento