Emitter: 4x3V Luminus SBT-90.2 LED High Intensity, neutral white or in cool white, mounted on copper DTP MCPCB
Intensity: >2175kcd (ANSI throw ~2950 m)
Firmware: Tom E's open-source NarsilM v1.3 adapted bv Texas Ace
User interface: By default the GT94Xis set to use the very intuitive Narsil smooth RAMPING UI.Instant access to a 28A TURBO mode is also provided.
 A more conventional discrete level MODE-SET UIis available as an alternative. Any one of 12 pre- defined mode-sets can be selected.
 MOMENTARY mode is useful for signaling purposes or rapidly/briefly lighting up targets.
Battery: Four button-top 21700 cellS(4S) or eight cells (4S2P) via the extension tube (excluded). Unprotected cells are recommended. Cells are not included.
Driver: 12V, Texas Avenger V2
Reflector: 118 mm inner diameter, aluminum smooth finish
Lens: Glass with anti-reflective coating
Body: Aluminum with Type lI hard-coat anodizing
Tripod socket: Standard 1/4 inch threaded (1/4-20 UNC)
Button: Tactile with back-lit rubber boot Ingress rating: Equivalent to IP65
Weight: Approximately 2.5kg without cells and handle
Dimensions: 135mm b head x 239mm b length x 56mm I tube
Use only reputable 21700 cells of known origin, button top cells are recommended.
Use a reliable battery charger. Never over-charge or over-discharge cells.
Used four button-top 21700 cells (4S). It is therefore important that all cells are identical: Same make, model, capacity, age, used cycles, and furthermore charged to the same level.
Remove and recharge cells when the low voltage indication is given by the GT94X (repeated step-downs in light level and eventual shutdown of the light).
The extraordinary energy density that 21700 cells offers also means that hazardous conditions are created when a cll is short-circuited or damaged.
Always treat cells with respect and properly dispose of damaged cells.
The GT94Xis a very high-intensity flashlight. Do not point the GT94X directly at a person, animal, moving vehicles or flammable materials.
When running at higher output levels the head of the GT94X will slowly heat.This is normal. In warmer ambient conditions this temperature may exceed
6o degrees Celsius, so please take the necessary precautions when handling the GT94X.
Load the batteries correctly, and screw the tail-cap back. The GT94Xwill flash twice-cap to a gentle stop. Do not when electrical contact is made. Continue to tighten the tail tighten.
The GT94X comes factory-set to use the RAMPING UI: From OFF, press&hold the side button. The light output will ramp up from a very low level to full
power. Release the button when the required light level is reached. (The full ramp takes about 3 s.) Use a single-Click at any time to turn the GT94X OFF. Please see below for further details.
There is a very small drain on the battery while OFF. This should not be of any concern, but we recommend removing the cells (or partially loosening the tail-cap)if the GT94Xwillnot be used for several months.
By default the button back-light is illuminated while the GT94Xis 0FF. This is normal and is done to easily locate the button in a dark environment. Turning the GT94X ON, then OFF, in rapid succession, disables the back-light until the next use. This is also normal.
For the complete user manual and any questions you might have about your GT94X, please visit the GT support thread on BLF. The link is on the last page of this manual.
Default Ul: Smooth ramping
This feature-rich Ul provides for smooth ramping of the light output between O and 50%, with an easily accessible 100% TURBO mode.
Turn the GT94XON: single-click the button, GT94X turns ON using the previously used light output level
Ramp light level: press&hold button
Reverse ramp: while ramping in one direction, release button briefly and press&hold again
Instant TURBO: double-click
Turn the Lamp OFF: single-click
MOON mode: from OFF: press the button and release as soon as the GT94X turns on
Strobes: Defaulted DlSABLE. Reset it on Advanced Operation if required
Battery status: triple-click (4 blinks, a short pause, then 1 blink would indicate 4.1 Vaverage per cell, for example)
Electronic lock-out: four clicks to disable the GT94X same to re-enable the Lamp
MOMENTARY mode: five clicks (loosen and re tighten the tail-cap to return to normal operation)
Factory reset: triple-click (battery status mode), then double-click (driver temperature mode), double-click again (firmware version mode), then
press&hold for about 2 s. Four blinks confirm a successful reset.
Alternative Ul: Mode -sets
The GT94X is factory-set to operate using the contemporary RAMPING user interface, as described in the previous section. However, the GT94X canalso be operated using a more conventional MODE-SET style user interface. (See next section for detail on how to set Ul options).
Using the MODE-SET UI the output does not ramp, it steps from one mode to the next using single-clicks.
Turn the GT94XON: single-click
Next mode: single-click before the current
mode 'locks in'(1.2s)
Previous mode: press&hold
Last mode [100%]: from OFF: press&hold
Turn the GT94X OFF: single-click button, after resting on a mode more than 1.2s (mode locked in)
Strobes: Defaulted DlSABLE. Reset it on Advanced Operation if required.
Battery status: from OFF: single-click followed by press&hold (4 blinks, a short pause, then 1 blink would indicate 4.1 Vaverage per cell, for example)
Electronic lock-out: from OFF: double-click followed bypress&hold, same to re- enable the GT94X
Factory reset: from OFF, single-click followed by a press&hold (battery status mode), then double-click (driver temperature mode), double-click again (firmware version mode), then press&hold for about 2 s. Four blinks confirm a successful reset.
By default the GT94X firmware is set to suit most users and applications, but several settings are user-configurable. To enter the configuration settings, press&hold the button for about 8 s (3s if in the MODE-SET Ul), do not release until a double flash followed by a single blink is seen. The single blink is the prompt for the first setting. Click the button as many times as required for that setting, or leave the setting alone and simply wait for the next double flash, this time followed by two blinks, indicating that we are now at setting #2, etc.
The GT94X confirms each click with a blink.A press&hold skips to the next setting. A continuous press exits the setup menu completely. Four blinks indicate that the setup is completed.
The available setings differ, depending if the GT94Xis currently set to the RAMPING UI or the MODE-SET UI. Note that changing setting 1 flips to the other Ul and immediately kicks you into the table for that Ul: