Emitter: Three LEDs on a copper DTP MCPCB e.g.
Cree XP-L HI 3D(NW 5000K)
Cree XP-L HI 1A(CW 6500K)
Nichia 219C 4000K
Luminus SST20 4000K 95 CRI
Optic: Standard TIR optics
Lens: Glass with anti-reflective coating
Flux: ~2800 lm (XP-L Hi), ~1600 lm (Nichia)
Intensity: ~12 500 cd ANSI throw ~223 m (XP-L Hi)
Firmware: The FW3A uses free software called Andúril,
distributed under the terms of the GPL v3. Code is available from
User interfaces:  By default the FW3A is set to use SMOOTH RAMPING.
Instant access to TURBO mode is also provided.
 A more conventional STEPPED RAMPING UI is available if you
like discrete modes level. You can choose how many steps you want.
 MOMENTARY mode is useful for signaling purposes or rapidly/briefly
lighting up targets. To exit this mode, physically disconnect power
 MUGGLE mode uses a reduced output.
 It has an electronic LOCKOUT for safety, but acts also as momentary
low light.Other functions: Battery check, sunset, beacon,
tactical strobe, party strobe, bike flasher, candlelight, lightning storm
Battery: One flat-top or button-top 18650 cell. An unprotected cell is recommended.
Max. length 66 mm. Cell is not included.
Driver: FET+7+1 driver. Low parasitic drain while OFF
Body: Aluminum with hard-coat anodizing
Switch: side switch
Ingress rating: Equivalent to IPX7
Weight: Approximately 76.5 g without cells
Size: 27.8 mm Ø head x 93.9 mm length.