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  • TN40S
  • TN40S
  • TN40S



Product Description


  • One of the most powerful long range lights on the market.
  • Uses four advanced CREE XP-L HI LEDs with a lifespan of 20 years
  • The high output reaches 4450 lumens and an ultra-long distance of 1151 meters. 
  • ThruNite ITC technology to prevents possible damage from overheating.
  • Intelligent and ergonomic user-friendly interface.


  • LED: 4xCREE XP-L HI LED with a lifespan of 20+ years of run time.
  • Runs on:  18650 (ThruNite 18650 3400Mah not included). 
  • Working voltage: 5V-9V.
  • Charging current/voltage: 8.4V, 3.5A. 
  • Output & Runtime (Tested with four pieces ThruNite Li-ion 18650 batteries (3.6V/3400mAh) and for CW. NW parameters is 10% off):
    • Strobe(1100 lumens /9hrs),
    • Turbo(4450 lumens/85mins),
    • High(1780 lumens /2.7hrs),
    • Medium(580 lumens /9.5hrs),
    • Low(90 lumens /2.5days),
    • Firefly (1.2 lumens /57days).
  • Peak beam intensity: 331200cd.
  • Max beam distance: 1151m.
  • Waterproof to IPX-8 Standard (2 meters).
  • Impact resistant: 1.0 meter.
  • Working Temperature: -40℃-40℃.
  • Dimensions: 173mm (length) x 100mm x 52mm.
  • Weight: 592g (battery not included).
  • Accessories: Shoulder strap*1, Strap ring*1, Spare O-ring*2, Side switch Cap*1


  • Turn On/Off 
    Press the side switch to turn the light on/off.
  • Change Mode
    • When the light is on, long press the side switch to cycle through low, medium and high.
    • Shortcut to firefly: When the light is off, long press the side switch to get firefly mode.
    • Double click to turn to turbo from any mode. Another double click to get strobe.
  • ITC Technology
    The light will automatically lower the current when temperature in LED or driver rises to 80 degrees centigrade to protect the flashlight from overheating. Thus to extend its lifespan.
  • Memory Function
    The light will turn on in the last mode accessed, except firefly, turbo and strobe. 
  • Low Voltage Indication
    When the indicating light on the side switch turns from blue to red, it means the batteries should be replaced or charged.
  • Battery Replacement:
    Take off the tail cap, insert four 18650 batteries into the battery carrier, put the carrier into the flashlight and screw on the tail cap. With either end of the battery carrier towards the light head is OK. But make sure the batteries are correctly inserted into the carrier with polarities matched (springs on the carrier should connect with the cathodes of batteries).

Other Details


Product Reviews

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  1. Excellent Flashlight 5 Star Review

    Posted by on 17th Dec 2020

    I'm very pleased with the TN40S. I ordered the neutral white version and couldn't be happier. My primary purpose is to keep in the truck while hunting and camping. For the amount of light this throws it will be easy to store, and it is very comfortable to hold. The strap that was included seems to be great quality as well, and it makes this even easier to hold and handle. If you are looking for a light to illuminate large areas, this is an excellent choice!

  2. God said let there be light! 5 Star Review

    Posted by on 2nd Jun 2019

    And he turned on the thruNite TN 40s.
    Enough said.

  3. Great Light 5 Star Review

    Posted by on 17th Feb 2018

    The only thing is it can't stay on turbo for long. It does last that 1.5 hours on Turbo. To find out, I had to put the light in the refrigerator. It still got hot so I had to transfer it into the freezer. The other thing is the paint comes off easily, and the strap has metal ends that chips where it makes contact with the light.

Showing reviews 1-3 of 12 | Next

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