BlueSwordM
(BlueSwordM)
3
Do you want a light that only runs at 600mA-800mA or a driver?
If so, you are in luck actually.
There is this light which support 21700s with an additional tube:
And you can get this 22mm triple channel driver, only put 1*7135 +1*7135 for maximum regulation, and FET if you really need it.
You can get it built from Lexel: