Site Information

 Loading... Please wait...
  • Image 1
  • 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

Write Review

Showing reviews 1-3 of 11 | Next

  1. 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.

  2. 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.

  3. Laser beam with spill 5 Star Review

    Posted by on 29th Jan 2018

    I had wanted this light for a long time before I bought it. I already had a TN31 and a Nitecore TM26. I did not think I needed this light...until I bought one. A laser beam with spill. I have not taken it out to the country yet because I had to get the right batteries for it. This light is just the right size and is a lot smaller than the TN42 from what I can see in comparison videos. It comes with a shoulder strap, but it almost doesn't need one. Very light in the hand. I keep it in a Pelican 1300 case for search and rescue. You can just pull out the foam from the box this light came in and put it in the Pelican case. Fits well. In the room left over you have plenty of room for a 4-cell charger and extra batteries. Now you have a searchlight kit ready for any search and rescue situation. I still need a battery pouch with 2 sections to separate the spent batteries from the good ones in case of an extended rescue operation.

    You'll like the UI on this light. It is identical to many of Thrunite's other lights. This is refreshing because it is extremely difficult to remember all the ways to operate all these other lights you purchase over the years, so they mostly get put away and not used or you end up giving them away, which is what I have been doing lately. I will not be giving the TN40 away! I'm keeping this one.

Showing reviews 1-3 of 11 | Next

Find Similar Products by Category

Related Products

Click the button below to add the TN40S to your wish list.