Sofirn is the manufacturer who made the BLF Q8. With 4x cool white XPL HI LED. Sofirn Q8 throws further than BLF Q8. Other than that, Sofirn Q8 is the same as BLF Q8: powerful, tough, great UI but easy operation.* The Q8 is intended to be used with button top cells. The use of protected cells is highly recommended*The Q8 is a very bright flashlight, do not point the beam at others. It is not a toy, do not let children play with it, and never leave the flashlight ON unattended.*Use the lock-out sequence to deactivate the switch before putting the Q8 in a pocket or bag.Specifications:Output: 5000 Lumens (max.)Led: 4* Cree XPL HI LEDPeak Beam Intensity: 50,000+ cdPeak Beam Distance: 550 metersTint: 6000K-6500KBattery Configurations: (4*18650 button top batteries included)Switch Type: Electronic switch Material: Made of Air-craft grade Durable Aluminum AlloyReflector: Aluminum smooth reflectiveUse advanced temperature regulation (ATR) technologyWater resistant: IPX8Working Voltage: 3-4.2VFor the safety to the battery: bit.ly/lionsafetyFor more information to see: bit.ly/blfq8Product review from BLF Forum:http://budgetlightforum.com/node/45915