Review: New Thorfire TK4A 4xAA Flashlight (2016)

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WalkIntoTheLight
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Oh, I see I was mentioned in this thread. To clarify my results, I stick by my observation that this light is well-regulated (at least on medium, which is the only mode that can run without any step-downs). However, I do not have an integrating sphere, and my light-meter results are probably only accurate to about 5% or 10%. So, it is quite possible that the light output might drop by as much as 10% over the entire run-time. IMO, that is negligible, and wouldn’t even be noticeable to a user. (My graphs are drawn with Excel and no curve-fitting, so that’s why they look so flat. I find curve-fitting the graphs may look better, but show inaccurate results in some areas.)

I did not do long run-time tests with alkaline batteries, so I’m not sure how it performs with those. I suspect, not very well.

If I compare this light to another 4xAA light, such as the Crelant 4VA, there is a large and noticeable drop in output from the Crelant over its run-time. IMO, the Crelant V4A is an example of a light that does not have regulated output. It has much higher lux than the Thorfire, but only when the batteries have good charge. I use both lights, but I find the Thorfire to be a better general-purpose light.

Tangra
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Just to add info.
The holster was awful and I throw it way.
In user manual is written that this light has 3 minutes step down in turbo and 30 minutes in high mode.
Did someone tested weather Nitecore diffuser NDF40 and traffic wand NTW4D will fit to TK4A?

Dusty
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I have the Sofirn (SF11) version of this light. I actually have 2. My original came with issues. It would turn on, or off, switch modes, all kinds of erratic behavior. Sofirn sent a replacement within 2 days that works great. Really like this little light.

I got the bad one apart. The bezel was lightly glued, but broke loose by hand. It has a pressed in shelf for the MPCB. It pulled out with minimal effort with a pair of forceps, after de-soldering the leads. The driver is held with 1 screw. I actually damaged the case taking the switch cover off, thinking it needed to come out first, before pulling the shelf. I didn’t want to damage the switch. It was not needed. I was hoping the issue was constant pressure on the switch (compared to the working light), but no joy. I haven’t had time to try and isolate the problem.
Here are a couple of terrible cell pics.

EDIT: I didn’t realize this review was done almost a year ago.

Brian

DB Custom
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Nice little light, for sure. I was asked to disassemble the Thorfire version and they really didn’t want it disassembled!

I didn’t see an o-ring between the reflector and lens, nor between the lens and bezel. I could possibly have lost it but I don’t think so. I’ll go back and double check or find one that fits.

The Thorfire version was not lightly glued. Quite the contrary, it was very heavily glued and took a lot to get it apart. I mounted the bezel in my 5” chuck on the lathe and spun it up, hit it with a propane torch for 45 seconds, then used a large Boa Constrictor rubber strap wrench to unscrew the body. It was arguing, biting and screeching the entire way out! Ornery crittur! Wink

Not sure what my buddy is going to do with it now, but I may end up buying one myself as it’s a neat little light for a AA power supply…

DoubleA
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Any diffuser wand available for this type of light?

and on the first day he said "Let there be light"...

Boaz
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DoubleA wrote:
Any diffuser wand available for this type of light?

Funny you should ask ….
With a little whittling on the threads of the caps off of V8 Fusion you can have red, purple ,yellow,blue and probably 4 other colors pop on and off caps . You can keep it on the tail too
I have one on my desk with a red cap on the front…three red rubberbands in the three cracks and another red cap on back end…kills lots of lumens but lots of flashlight fun for no money

       καὶ τὸ φῶς ἐν τῇ σκοτίᾳ φαίνει καὶ ἡ σκοτία αὐτὸ οὐ κατέλαβεν

                            

       Dc-fix diffuser film  >…  http://budgetlightforum.com/node/42208

DoubleA
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Too bad it ain’t available in my country. So I would rather go for a dedicated diffuser.

and on the first day he said "Let there be light"...

Boaz
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it’s pretty common size cap . it’s just the larger of the two common caps on 1/2 gallon juice bottles . Gatorade is the same size too so you can add orange to the list of cool colors .
When i get almost any light the first thing i do is try to find something that will tightly pop on the bezel . this light is cool because tail and head are the same size so you can keep your diffuser on the tail when you want throw .

If you cut a hole in the top of the cap //just leaving the rim you can cut a piece of hard diffuser material about the thickness of a playing card and glue it in to make a pop on/ pop off diffuser . Again …really simple .If you need hard diffusion material or Dc fix just PM me I have lots of both. I find the hard stuff to be really handy and have even used it in the place of a lens.

       καὶ τὸ φῶς ἐν τῇ σκοτίᾳ φαίνει καὶ ἡ σκοτία αὐτὸ οὐ κατέλαβεν

                            

       Dc-fix diffuser film  >…  http://budgetlightforum.com/node/42208

Boaz
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* If you want dirt cheap wand like diffuser for this light try a little Keurig coffee container . A rubber band around the bezel helps to keep it on.

       καὶ τὸ φῶς ἐν τῇ σκοτίᾳ φαίνει καὶ ἡ σκοτία αὐτὸ οὐ κατέλαβεν

                            

       Dc-fix diffuser film  >…  http://budgetlightforum.com/node/42208

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