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  • TN42 runs on 4 x 18650 (ThruNite 18650 3200Mah).
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TN42 LED Searchlight


Product Description


  • One of the most powerful throw LED lights on the market.
  • Uses one advanced CREE XHP35 HI LEDs with a lifespan of 20 years
  • The high output reaches 2000 lumens and an ultra-long distance of 1550 meters. 
  • ThruNite ITC technology to prevents possible damage from overheating.
  • Reversed polarity protection system prevents damage to the light.
  • Intelligent and ergonomic user-friendly interface.
  • Only applicable for 18650 batteries to use.


  • LED: 1xCREE XHP35 HI LED with a lifespan of 20+ years of run time.
  • Runs on:  18650 (ThruNite 18650 3200Mah).
  • Working voltage: 5.5V-8.4V.
  • Output & Runtime (Tested with four pieces ThruNite Li-ion 18650 batteries (3.6V/3400mAh) and for CW. NW parameters is 10% off):
    • Strobe(680 lumens /10.8hrs),
    • Turbo(2000 lumens/1.5hrs),
    • High(780 lumens /5.3hrs),
    • Medium(256 lumens /17.8hrs),
    • Low(38 lumens /4.3days),
    • Firefly (0.8 lumens /58days).
  • Peak beam intensity: 600750cd.
  • Max beam distance: 1550m.
  • Waterproof to IPX-8 Standard (2 meters).
  • Impact resistant: 1.0 meter.
  • Working Temperature: -40℃-40℃.
  • Dimensions: 206mm (length) x 100mm x 52mm.
  • Weight: 666g (including battery carrier).
  • Accessories: Shoulder strap*1, Strap ring*1, A, Spare O-ring*2, Side switch Cap*1, Battery Carrier x1 (inside the flashlight).


  • 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 battery package 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).

Product Reviews

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  1. Great Light! 5 Star Review

    Posted by on 23rd Apr 2017

    The light is great, and unlike the TN40, the light stays much cooler. The only down-fall is the black finish on the light. It easily cracks and peels off from a simple slide on top of a table. The lights in Thrunites line need a BETTER finish. Also, the base clip for the strap scratches up the but of the light and exposes raw silver aluminum. Need a non-metal connector against the light instead of metal to metal.

  2. TN42 5 Star Review

    Posted by on 21st Apr 2017

    Diese Lampe hat ordendlich Reichweite,
    und ist gut verarbeitet.
    Da immer zwei der vier Zellen parallel betrieben werden,
    ist der Betrieb auch mit zwei Zellen möglich.

  3. Great flashlight 5 Star Review

    Posted by on 23rd Jan 2017

    Wow, it throws a mile (literally) and is super dependable. If you want the best handheld thrower money can buy, this is it.

  4. TN42 NW, extreme distance throw, aestethics scratches. 3 Star Review

    Posted by on 20th Jan 2017

    Torch ordered from the official website of the manufacturer, in the period of Christmas sales and arrived by courier balances in 2 days only.
    flawless performance, incredible intensity of the spot (640,000 candles) and tint in my version Neutral White NW, very beautiful with white coloring cream on 5000 K. It is not a minor thing to find a flashlight beam well cared for both geometrically and tint.
    The abundant size does not make it too heavy, however, so it is rather handy, even more so if you wear the practice shoulder strap, which allows you to walk having the torch always available at your side.
    Coming to the less pleasant notes (in a torch from the premium price): When I opened the box, I noticed small signs both outside and inside on the anodization.
    As in attached photos I tried to show the scratches, in my opinion I do not think they result from the a imperfect quality control, but I imagine are due to the fact that this flashlight is a case of reconditioned product, the result of a return for unknown reasons by a user (I find deplorable abuse of rendered services that are offered there) that before making it ruined it for his uncarelessness. At this point is the failure to control by ThruNite to ensure a quality standard appropriate to the next client.
    I note: a small abrasion in the coupling edge head-parable, an abrasion on the inside of the head, many scratches in the metal that makes contact between + and - pole of the battery carrier, but the worst thing, the end the threaded portion of the torch body is slightly bent, as if it was narrowed with a small grain of sand or other impurities. This could impact on the waterproof level of the flashlight features.
    By writing to the customer service I was simply told that these imperfections are the result of the production process, that of quality and delivery control. I felt slightly teased, inadequate customer service in my opinion, as well as quality control.
    For the rest, truly phenomenal torch!

  5. Amazing 5 Star Review

    Posted by on 19th Jan 2017

    This light is amazing it's the brightest flashlight I have ever seen. The best part is the beam is narrow it just cuts through the dark. Seen the review on Viking preparedness. As Mr. Fox said it's a light cannon

  6. This light is AWESOME! 5 Star Review

    Posted by on 19th Jan 2017

    There isn't really much more to say past the title. However, I would like to say that I live in a rural area; so, I was able to actually test the claimed throw of this light. This light lit up a white water tower at 1550 meters away!!! The next leading competitor on the market was unable to do this. In plain english, TN42 > K70. Love this super thrower!!!

  7. AMAZING 5 Star Review

    Posted by on 10th Jan 2017

    Simply put this is a first class amazing flashlight. Its high grade materials combined with best LED technology producing incredible distance as a throw flashlight. You can not find anything better than this for distance, quality and fit and finish. Only thing you need to know is it does NOT come with batteries so you must purchase batteries in addition. You will not be disappointed.I also have a TN 40 which is an amazing flashlight as well just less distance and more flood to it.

  8. Great light 5 Star Review

    Posted by on 5th Jan 2017

    Lit up a white location marker on an peninsula over a lake
    I guess it was a 1/2 mile or better away, the light wasn't
    even on turbo. Aimed at the sky on turbo and it reminded
    me of the military search lights from the fifties and sixteys.
    This is my first real flashlight.

  9. Great Porduct 5 Star Review

    Posted by on 4th Jan 2017

    Beautifully designed and well engineered product.

  10. TM 42 5 Star Review

    Posted by on 31st Dec 2016

    Flashlight TM42 is a great product dedicated for the uniformed services and demanding users flashlights. It is characterized by the largest reach of the market with not so large weight. The product worth recommending.

  11. Unbelievable thrower 5 Star Review

    Posted by on 23rd Nov 2016

    I just sold my Xenon HID 75 Watt torch because of this amazing thrower of a flashlight! No more warming up time because of the HID, but instant power at full throttle. I compared them and there's no doubt. Thanks to the magnificent reflector of the TN42 which is really an artwork the beam goes on and on into the darkness, lightening everything up as far as your eyes can see. This truly is a Thrower-King.

  12. Throws nearly a mile? 5 Star Review

    Posted by on 16th Nov 2016

    Yup. This light is unreal. Super high quality. If you have the need for a legit thrower, you will be hard pressed to find a better one. I've tested this light against some monsters and it's my favorite. Even next to a V54 custom light (which cost 350.00ish), it outshines them all. I can't wait to see what V54 will do with this beast. Absolutely amazing light.

  13. Best of the Best 5 Star Review

    Posted by on 1st Nov 2016

    Simply OUTSTANDING!!! This is much more than JUST a flashlight. THIS IS A WEAPON. I also own the TN31 1150lums and it is a great light but now its retired. The TN42 is incredible. If you shine it on your hand held out at arms length, the reflected light just off your hand is so bright you can't look at it. Shine it on a persons hand 15ft away and you feel heat yet the light itself never really gets to hot. My light will stay on high for a long time. Have never timed it but it has never kicked down on me yet for at least 20-30 min. of use. That I REALLY like, who wants a search light that's will only run on high for 5 or 8 min. or something like that. This is the last light you'll ever need.

  14. AWESOME 5 Star Review

    Posted by on 11th Oct 2016

    I own 4 incredible Thrower LED Flashlights.The Olight SR52UT,A Fenix TK61 with the TK75 battery pak extension, A ThruNite TN32 and now the THRUNITE TN42 . Yes, I saved the very best for the very last ! From the fat body to the massive lens head, its magnificent .It clearly out throws the other flashliights I own.

  15. Farthest Thrower out there 5 Star Review

    Posted by on 10th Oct 2016

    Been waiting for this light. Hoping it would produce and it does.
    If you are looking for the farthest throwing LED light on the market this is it. I have provided a video on youtube showing this beast.

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