Wow, let me be the first to welcome you to BLF JamesM!
There are two versions of the 5000 lumen Q8, which was designed and project-managed by BLF members including djozz, Tom E, Pilotdog68, MRsDNF, Thijsco, and The Miller. (A huge debt of gratitude is owed these individuals.)
- BLF Q8 - the original. Uses four XP-L HD LED and emits neutral white light. Another review. Available here.
- Sofirn Q8 - the next version. Uses XP-L HI LEDs and emits cool white light. Available here.
Both are manufactured in the same Sofirn factory in China and both use the same NarsilM user interface. A great light for viewing acreage, but a little heavy and cumbersome to use for EDC IMHO.