there is a long history in those lights.
from what I understand it goes like this...
Peter Gransee and Henry started by collaborating on the Arc4+ a 30 lumen multimode flashlight.
They parted ways and Henry started HDS - releasing a couple of different models.
Henry started to work with Novatac, I am not sure why he left (I think it may be a quality issue)
Novatac started to make lights in china.
Henry started RA lights, and later changed the name back to HDS.
I have a USA Novatac 120P, RA TW100 Twisty and 170tactical clicky (with golden dragon led)