mk23
(mk23)
18
I had to make the same decision a couple month ago and i decided to go with the BLF Q8 cause it's much more compact than the L6, a light that you can actually carry with you should you need high output. Beside 4 brightness modes for a 4000 lumens light for me is too little so i went with the Narsil firmware instead. If you really need to run the light continuously at high output then L6 is a better solution but if you don't then Q8 is a better light overall.
P/s: You also might want to take a look at Sofirn Q8, almost indentical to BLF Q8 but come with cool white xpl hi emitters for throw.