up for auction is a slightly used (maybe 1 min to test the item works) custom quad led and modified surefire 10 amp tailcap. Bulb can only be used in a custom bored surefire that to take a 18650 battery. Also solarforce models will fit this light such as a l2 l2p l2m l2t. Also please make sure you buy imr batteries from a tructed supplier. Here is some of the information. Tail cap was modified installing a 10A Judco switch, along w/ a 145 Tellurium Copper retaining ring, allowing for a much higher rate of current than a normal McClicky modification. Solid Brass P60 drop in; Quad Nichia 219C LEDs, Direct Drive FET driver, using the highly customizable Guppydrv2 firmware and braided driver spring. Driver firmware instructions can be found below. I will be happy to set the user group to the buyers preference prior to shipping. Lastly, also brand new without original bag, Surefire FM36 blue flip up filter (Never Used). Tail cap internals replaced w/ a modified 10A Judco switch, along w/ a 145 Tellurium Copper retaining ring, allowing for a much higher rate of current (A FET based Quad P60, powered by an 18650 Li-Ion battery WILL melt a McClicky switch which is why I had the 10A Judco made) P60:Solid BrassQuad (4) Nichia 219at; 5000k tint & 80+ CRISolid copper MCPCB directly reflow soldered to the P60 for optimum thermal transfer17mm Direct Drive FET using Guppydrv2 firmwareBraided driver spring A 14A reading, at the tail cap, using a freshly charged Sony VTC4 18650 Li-Ion battery indicates well over ~3500 lumen out the front. The setup is insanely bright. I'm liquidating part of my collection to free up cash for another purchase so please see my other Surefire related offerings, as well as, take advantage of combined shipping. Feel free to ask questions and I'll respond as quickly as possible. Free Shipping within the United States. International purchases will require additional shipping charges based on location. If you'd like to see beam shots from the light, outside while pitch black in the NW VA country side, message me and I'll be happy to share them. Guppydrv ​Instructions To switch mode groups: rapidly tap the switch 8 times, the light will then enter the programming mode and begin to flash. With the light in programming mode, tap the switch the same number of times as your desired mode group. The light will blink and your mode group will be memorized. Example: To select mode group 3, tap the switch 8 times quickly to enter programming mode. As soon as the light enters programming mode and beings flashing, tap the switch three times. The light will blink to recognize the mode group change. To set the turbo timer: rapidly tap the switch 8 times, the light will then enter the programming mode and begin to flash. With the light in programming mode, tap the switch 30 times to enter the turbo timer set mode. The light will then switch to 100% power. When the light is at the desired temperature for the turbo step down, turn the light off. The turbo timer will then be set. The turbo timer steps the light down to 50% regardless of the mode group set. Rev.2 User Selectable Groups: 1. 100% Only 2. 5% - 100% | Memory 3. 5% - 100% | No Memory 4. 30% - 100% | Memory 5. 30% - 100% | No Memory 6. 70% - 100% | Memory 7. 70% - 100% | No Memory 8. ML - 30% - 100% | Memory 9. ML - 30% - 100% | No Memory 10. 100% - 30% - ML | No Memory 11. ML - 5% - 15% - 50% - 70% - 100% | Memory 12. ML - 5% - 15% - 50% - 70% - 100% | No Memory 13. 100% - 70% - 50% - 15% - 5% - ML | No Memory 14. Strobe Only 15. 100% - Strobe | No Memory 16. Strobe - 100% | No Memory 17. 100% - 1Hz Blink | No Memory 18. ML - 5% - 30% - 70% - 100% - Strobe - 1Hz Blink | No Memory 19. 100% - 70% - 30% - 5% - ML - Strobe - 1Hz Blink | No Memory 20. 5% - 30% - 100% - 1Hz Blink - 3Hz Blink - Strobe - Beacon | No Memory ***** please not after you turn off the bulb in no memory mode the bulb will go back to the first setting after 30 sec. If you turn the bulb back after 29 or less sec it will go to the next mode.****