Thrunite TC20 - XHP70 - 3800lm

[DB_Custom (Dale)]

The UT-02 is pretty compact, nice light to be sure. Really needs a bit of current boost but thats not difficult, the hard part is not overdoing it! lol

[beam0]

@DB Custom

The UT-02 is pretty compact, nice light to be sure. Really needs a bit of current boost but thats not difficult, the hard part is not overdoing it! lol

I’d like to see a photo of a TC20 along side of UT02 for size comparison.

[komeko]

@beam0

@DB Custom

The UT-02 is pretty compact, nice light to be sure. Really needs a bit of current boost but thats not difficult, the hard part is not overdoing it! lol

I’d like to see a photo of a TC20 along side of UT02 for size comparison.

So fast, so the quality hmmm:

[beam0]

Wow that was quick! Just what I wanted to see!

When I posted I was actually fishing for you to reply because I knew you had both!

Thanks komeko!!

[DB_Custom (Dale)]

Once again, the TC20 impresses with it’s diminutive stature… serious little handful of light this one.

[komeko]

@DB Custom

Once again, the TC20 impresses with it’s diminutive stature… serious little handful of light this one.

I would pay attention to words because DQG 26650 fanatics will come and they will defend their baby.

[DB_Custom (Dale)]

They are welcome to do that, of course. I have my own that I am quite fond of but it won’t replace such a light as the TC20, pretty sure.

Difficult to get a light any smaller than the DQG, to be sure, so it holds a standard of it’s very own that will probably not be equaled by anyone, much less bested.

[beam0]

@komeko

@DB Custom

Once again, the TC20 impresses with it’s diminutive stature… serious little handful of light this one.

I would pay attention to words because DQG 26650 fanatics will come and they will defend their baby.

@DB Custom

They are welcome to do that, of course. I have my own that I am quite fond of but it won’t replace such a light as the TC20, pretty sure.

Difficult to get a light any smaller than the DQG, to be sure, so it holds a standard of it’s very own that will probably not be equaled by anyone, much less bested.

Agree. It won’t replace my TC20… But I really need to get one! :+1:

[Rambo007]

My O rings are damaged both.I know there are 2 replacements .The only thing I did was apply CRC 2-26 to threads and changed the battery.What size O rings does TC20 use? What causes the Orings to get damaged on a new flashlight ?

[Itsme]

@Rambo007

My O rings are damaged both.I know there are 2 replacements .The only thing I did was apply CRC 2-26 to threads and changed the battery.What size O rings does TC20 use? What causes the Orings to get damaged on a new flashlight ?

In my experience, the only time that I have damaged an O ring was by taking a light apart while the light was very cold. This tore the O ring. I make sure to warm my lights up before I take them apart now

[Rambo007]

Thank you great tip @itsme

[Rambo007]

I emailed Thrunite and they explained 29mm*1.5mm is the size of the O-rings .They will send me a replacements.

[mmalive]

@Rambo007

I emailed Thrunite and they explained 29mm*1.5mm is the size of the O-rings .They will send me a replacements.

Nice man. Now I might just grab another CW version. BTW, what are the best MODS to do or leave ” AS IS ” ? Thanks.

[Rambo007]

Instead of buying another TC20 order the V6 Catapult for throw.
The Nitecore NUP10 Tactical pouch will carry both for me and a Benchmade 275

[SKV89]

I just cleaned the springs and battery terminals with 70% rubbing alcohol and on the same fully charged batteries, the startup brightness increased from 487 lux to 498 lux. It’s not alot but shows you how grease or other contaminants can be one of the factors for lumen variation between same batch of the same lights.

[beam0]

@SKV89

I just cleaned the springs and battery terminals with 70% rubbing alcohol and on the same fully charged batteries, the startup brightness increased from 487 lux to 498 lux. It’s not alot but shows you how grease or other contaminants can be one of the factors for lumen variation between same batch of the same lights.

I occasionally go over the contacts on my lights (lightly) with a piece of a fine Scotch Brite pad to remove the oxidation, restoring the contact surfaces to a bright color. Then I use the alcohol (91%)

I think that oxidation itself creates more resistance than the grease or oil that just the alcohol removes.

[mmalive]

@Rambo007

Instead of buying another TC20 order the V6 Catapult for throw.
The Nitecore NUP10 Tactical pouch will carry both for me and a Benchmade 275

More Throw but less lumens? About half lumens

[beam0]

@mmalive

@Rambo007

Instead of buying another TC20 order the V6 Catapult for throw.
The Nitecore NUP10 Tactical pouch will carry both for me and a Benchmade 275

More Throw but less lumens? About half lumens

Yes but it’s actually not really a huge difference. Half the lumens doesn’t mean you’ll see half the output, just like 4000lm is not twice as bright as 2000lm. That is VERY evident using the TC20…
When going from high (1800lm) to Turbo (3800lm) theres a noticeable difference, but no where near twice as bright, and about the same difference you would see between it and the V6 Catapult.

There’s been some posts on the subject before, the “perception of luminance”

• “it takes 4 times the lumens to see a doubling in brightness”

• “a perceived 50% lower perceived brightness is more towards 18% of actual luminance”

Inverse Square Law ...or Why a 800 lumen light is only twice as bright as a 200 lumen light

www.youtube.com/embed/F-xNMdIXJIs I love the example here because of the flashlight :P If we start at 3 lumens and multiply times 4 ..to get a percieved doubling of light. We start at ..3 ...12...48...200...800.../ next doubling doesn't happen until 3200 lumens ..after 1000 lumens we have real heat and battery issues . So when someone says either 800 or 1000 lumens I just shrug because it's almost impossible to see the difference between the two ..If output gains aren't rela…

.

The emitters used in today’s dedicated throwers (XP-L HI, XHP35 HI) do not produce the higher lumen output of XHP50-XHP70, but the XHP50-XHP70 cannot throw as far due to their floodier beam with larger hot spot.

In fact it was the bright floody beam with limited throw of my TC20 that put me on a quest to find a good, somewhat compact size thrower: Discussion of compact size production throwers 700m+ under $60

.

Instead of carrying two separate lights as Rambo007 described, several manufactures have designed models that combine the two beams into a single light, Niwalker may have been first several years ago with their NOVA MM18.

The MM18 has seen upgrades to the MM18II and now the MiniMax MM18III, plus a little brother added, the MiniMax MM18JR

More recent ones currently in the works are the Astrolux MF03, and the Manker MK39 Ranger (my personal favorite)

There’s also the upcoming fan-cooled Acebeam X70

[robo819]

A good example of what beam0 is saying , from some of the beamshots I have already , would be the Maxtoch 2X compared to the TC20.

The 2X is making about 1460 lumens compared to the TC20 at about 3800 lumens , but the 2X will put much more light downrange than the TC20 is capable of by far. I am not saying the TC20 don’t blow the 2X away at close range , but after 175 to 200 yards then the dedicated thrower (s) leave the TC20 in the dust as far as range using much less lumens due to the focus.
The TC20 will not even come close to putting enough light on target to see 800 yards or probably even 400 yards for that matter really , as it is a much more floody beam and “wall of light” closer up.
They are just 2 totally different types of lights and light beams.

Here is an example of what I am describing with a shot from the factory Maxtoch 2X with dedomed XM-L2 U4 1A emitter at 807 yards from a barn and then that same shot enlarged and then the 2X and TC20 both at 100 yards so you can see the much more concentrated beam from the thrower compared to the TC20.

2X at 807 yards

2X Enlarged 807 yards

2X 100 yards

TC20 100 yards on Turbo

[sp5it]

@sp5it

I have a problem with turbo. All cleaned, it drops from circa 8A to 6A in 1 sec.

Problem solved, battery issue.
With Lii-50A 26650 5000mah is OK.
Mike