Review: ThruNite TN42 LED Searchlight

!https://s21.postimg.org/nihbm29mv/IMG_4770.jpg!

^ I saw that. That is strange. So it will not go full power like that? It only stays in moonlight w/ 3 of 4 sections lit up?

Exact but lot less than moonlight mode. When turn into normal modes, including moonlight all dies of the led fires ok. So strange and sudden!

I do not get it?! It works well in normal modes?

So what mode was it in when you took that picture?

Does this mean that it will NOT turn off? You mention in the most recent post that it works in ALL the normal modes!

You lost me!

Here is your picture in case people miss the link:

Sorry for the confusion I am not very good with english but I will try to explain again. The flashlight does not turn off completely and remains as depicted. That is like a very very low moon mode.

Are all of your cells in properly—— Long click still makes moonlight—double click still goes to Turbo—from turbo short click to off or that almost moonlight (3 dies lit )

Yes the flashlight works properly and the batteries are the same and in the same position as yesterday. The only difference appeared today was this rare impossibility to totally off remaining thi 3 dies lighted ver very dim.

I would suggest posting in this TN42 thread. It gets more traffic. Thrunite TN 42 ,a new record in Throw _

With that said. I am sure you want to know what is causing that. Good news is your light works and ALL you need to do is take the batteries out until your ready to use the light.

Taking the batteries out reminds me of a SEPARATE AND DIFFERENT issue that I have HAD w/ my high powered lights for several years.

Condensation under the lens!

Solution:Silica gel packets in the battery tube and w/ the batteries which are stored in a big pill bottle until they are ready for use. It rarely happens anymore. if it does I just put in a fresh silica gel packet and refresh the other one in the microwave! I have had these packets for over 2 years.

BTW ALL those lights are modified by Vinh[V54] W/ The exception of the OSTS TN31mb which Michael Johnson Modified. Mine was the last one he did[470Kcd]. :wink: All others were b/w 390/420Kcd.A new XPG2 S2 bin had come out and I benefited from it! This was in December of 2013.

Hi Wolfdog, wow do you meant that some moisture got into the flashlight and it may cause this rare issue. I´ll try to dry the thing like you said. Then I will let you know. Thanks a lot!

No, No, No!!! I am sorry for confusing you.

Notice I said mine was a SEPARATE AND DIFFERENT ISSUE?!

Sooner or later someone will reply on here with a possible reason/solution.

Until then, REMOVE your batteries when you are not using the light!

I posted a picture of your light on the other thread which gets more traffic. The thread posted below that I mentioned to you.

Ahh!, haha thanks a lot for your effort and support. Now I understand.! :smiley:

Do all of the dies light up when the light is on? You would need a filter of some kind to be able to look directly at the LED when it’s very bright. I wonder if one of the dies somehow became a short. This would reduce the forward voltage of the LED (and cause that die to not light up) and possibly this caused the issue with glowing while off.

Look at the picture in post # 72! 3 of 4 are lit.

Hi Easy, I used two polarizer filter to look when the light is in moon mode and as far I can tell, all 4 dies lights ok. But I´ll try again.

Thanks a lot

Max

Yes these 3 dies remain glowing when the light is off. I looked again the led in moonlight mode and I can confirm that 4 dies are lights Ok. So strange…

Wolfdog,you misunderstood!! Easy asked to turn light on and see if the same [3 out of 4 dies on] thing happens?!! :person_facepalming:

I emailed HKJ….Hopefully some of the builders and modders on here will chime in. They may have an answer…my answers are unrelated to flashlights!!!

Well, I must wait for the knowledge and advice of some of the gurus in modding and electronics. Hope they can help me with this issue…

If all four dies are lighting at power on, I would suspect the e-switch wires maybe pinched or shaved and bleeding power to the emitter, not enough to fully light them when the light is off. There is always a bit of power going to the MCU via the e-switch, hence parasitic drain. There is a mess of wires between the inside of the head and reflector, they pass thru the shelf into the driver below, the ones I modded had sharp edges around this pass thru hole. I’m just guessing, but that is where I would look, first. Maybe remove the e-switch bezel and button and see if wiggling the wires kills the power going to the emitter, might even be the switch contacts on the back of the switch themselves? Then TN42 does have that lighted Blue ring when powered on.

Again just a guess, I haven’t had it happen to me…yet. but I am intrigued!!!