Tested and did a runtime for the R500 lamp in the 500L. Works fine and so-so runtime. Still cheaper than getting the entire G&P Scorpion R500 set
Full review up on the site.
Yes, as you can see from the review i completely used the WF-500L body,
you only need to get the R500 Lamp with the reflector available at www.lighthound.com cos u cant use the Cree reflector.
After that u can just buy only the R500 bulb if u need to replace it.