Hhmmm. That would be roughly 20K lumens from a 6 3V XHP50.2 Q8? If they go to 6 LED's, pleaseeeee make the head diameter bigger! It would be needed to help handle the extra heat, as well as making the reflectors little bigger to help on throw.
The SP03 is a good example of an expanded head on a 4P battery tube, nice pics here: https://budgetlightforum.com/t/-/20367. The glued handle on the SP03 is the biggest downside of this light.
Another example of an expanded head light on a 4P battery tube is the SupFire L1, nice pics here: https://budgetlightforum.com/t/-/25754
6 LED's would be great for the Q8 Pro, but please, make the head bigger in width. thanx!! It has a place, a unique form factor - the SP03 and L1 are hard to find and pretty old designs now. Using the same battery tube as a Q8 will be a big advantage, specially if the extension tube happens some day.
The Q8 has a direct, slightly better competitor now - they cloned our Q8, sold under the name of the Airpro DC7 listed here: https://www.amazon.com/Airpro-Professional-Flashlight-Rechargeable-Emergency, and reviewed here on BLF: https://budgetlightforum.com/t/-/56182
Sofirn - please do take note of this one. A Q8, they cloned our Q8 driver even, and added USB-C charging.