Convoy has released a 17mm, 3V, 8A buck driver with 5A and 3A coming soon

I'm assuming this will fit the C8 and many S-series lights. 8A is suitable for the SST-40 and SFT40, but will likely be limited by forward voltage with most emitters.

5A is running a 519A, SST-20, etc... fairly hard, while 3A is a pretty average single-emitter light.