Best guess, 17.2A on the 3V should be comparable to 8.6A on the 6V, and according to Djozz’s and Texas Ace’s 6V test that equates to around 4700/4800 lumens, and they tested warmer tints.
So, a lot 
How long before it’s too hot to hold?
Best guess, 17.2A on the 3V should be comparable to 8.6A on the 6V, and according to Djozz’s and Texas Ace’s 6V test that equates to around 4700/4800 lumens, and they tested warmer tints.
So, a lot How long before it’s too hot to hold?