Thrunite TC20 - XHP70 - 3800lm

Thank you great tip @itsme

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.

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

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.

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”

.

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

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

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

Guys, can you help me finding good bicycle mount for that flashlight?
Tia, Mike

Amazon upto 33cm

[2 Pack] Vonpri Flashlight Holder, Mount Bicycle Mounting Bracket Flashlight Holder Torch Clip 360º Rotation

Thanks Rambo007.

Is there any pic how is led mounted? I wonder if mt-g2 on 20mm noctigon will fit there.
Mike

Well, I could not stand it :smiling_imp:
I cut the Thrunite battery. It pissed me off that with a bigger current it gets so bad and I came to the conclusion that it is probably a security device and not the battery itself. I dumped everything and the battery itself was left. Now it’s flying like Lii-50A. At UT-02 I am 6A and TC-20 9.5A. Turbo holds over two minutes and then drops because the temperature reaches 60 degrees Celsius. You have to take into account that the ambient temperature is 30 degrees, very warm ufff. That’s how the battery lay for me because I do not have any lamp with power consumption below 5A. Now it is flying in the TC-20. :crown:

Great info. My Thrunite battery dimmed turbo after 2s. I will rip it apart :slight_smile:
Mike

I realized that the other night as well. I’m going to rip it apart today.

sp5it, Edness… How much are your lights dimming in output? (estimate)

With the Thrunite cell mine is down about 100lm at 30 seconds compared to turn on, I didn’t record how soon the drop actually occurred after turn on, but it’s not really enough to notice visually. I’m going to do some measurements again when I have time, and also check it with a Lii-50A.

For mine it was dropping out of turbo almost immediately. I thought it’s my eyes but when i meausred it with lii50a, lux meter don’t lie.

I just took the battery apart, it no longer drops out of turbo and the number matches with lii50a and efest purple.

my battery has a blue wrapper under the Thrunite wrap.

100 lumen in 30 seconds is just the led heating up and is normal. The other guys are probably getting about 700 to 800 lumen drops (from 8A to 6A at battery).