TrustFire TR-J12, $54-Shipped, Aliexpress

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mvyrmnd
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Mine arrived today.

I’m getting 4A at the tailcap from 2 trustfire cells at 4.02v each.

I’m getting 5A at the tailcap from 2 MNKE IMR 26650’s at 3.99v each.

mvyrmnd
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Aaand the +be spring just melted after 3 mins in the MNKE’s

Yay.

2100
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Richie086 wrote:
Just took it outside and put it up against my DRY NW on Turbo and somehow my J12 beat it. I came inside and did a ceiling bounce test between both to see what the meter showed. The Dry read 630 lux and my new J12 read 805 lux under the exact same conditions. Perhaps the fact the Dry is NW tint and the J12 has a slightly cooler tint must be the reason for it being slightly brighter. Whatever the reason, I find it amazing the Dry got edged out.

How much current is the DRY NW drawing at the tail? Is it the older T5 4B NW tint offered first or the newer T6 3C NW?

I have forgottent how much my T5 4B is doing, if i remember correctly it probably is just 2100-2200 lumens or so.

mvyrmnd
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mvyrmnd wrote:
Aaand the +be spring just melted after 3 mins in the MNKE’s

Yay.

I’ve replaced the spring with a much heavier one, and now I read 5.5A on the MNKE’s Big Smile

And that’s with thin leads on a multimeter. I suspect the amps through the switch are somewhat higher.

I wish I had a lightmeter to compare with my other lights.

chriscalderon
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I have the tr-j18 i would buy the the j12 if they didn’t lose 10-15% output power witihin 10-15 min do to heat.

mvyrmnd
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Ok, I’ve used a lux meter app on my iPhone to get these results.

They’re relative, at least Smile

J12 on IMR : 735lux
J12 on Ultrafire: 705lux
Mac’s Customs 3300l (High CRI, warm tint): 600lux

Multiple readings were taken and averaged over a few minutes.

The 3300L costs literally 10x as much as the J12, has 9 XP-G’s at 1550mA each.

2100
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mvyrmnd wrote:
Ok, I’ve used a lux meter app on my iPhone to get these results.

They’re relative, at least Smile

J12 on IMR : 735lux
J12 on Ultrafire: 705lux
Mac’s Customs 3300l (High CRI, warm tint): 600lux

Multiple readings were taken and averaged over a few minutes.

The 3300L costs literally 10x as much as the J12, has 9 XP-G’s at 1550mA each.

The current hotshot is the Trustfire X100. Unfortunately the J12 tube does not fit. In 2S application, it is close to 4000 lumens OTF.

mvyrmnd
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I’ve got the KD driver on order to upgrade this to its full potential.

I’ve been running a full-burn stress test over the last hour or so. The batteries were charged to 4.20V and the light is tailstanding on a table in the corner of a room with no air movement. The iPhone is laying on the table next to the light, measuring the ceiling bounce lux. The results will mean little compared to someone elses results, but will give a good indication of output loss during the burn.

The results so far:

0:00 – 735 Lux
5:00 – 705 Lux
10:00 – 690 Lux
20:00 – 675 Lux
30:00 – 665 Lux – now too hot to hold
40:00 – 655 Lux – tube now uncomfortably hot.
50:00 – 645 Lux
60:00 – 640 Lux

I’ve no idea how long it will continue to run – I bet not long Wink

It’s lost 15% of its output from cold to being too hot to hold on to. Not bad for my book.

EDIT: 70:00 battery PCB cutoff Smile

2100
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mvyrmnd wrote:
I’ve got the KD driver on order to upgrade this to its full potential.

I’ve been running a full-burn stress test over the last hour or so. The batteries were charged to 4.20V and the light is tailstanding on a table in the corner of a room with no air movement. The iPhone is laying on the table next to the light, measuring the ceiling bounce lux. The results will mean little compared to someone elses results, but will give a good indication of output loss during the burn.

The results so far:

0:00 – 735 Lux
5:00 – 705 Lux
10:00 – 690 Lux
20:00 – 675 Lux
30:00 – 665 Lux – now too hot to hold
40:00 – 655 Lux – tube now uncomfortably hot.
50:00 – 645 Lux
60:00 – 640 Lux

I’ve no idea how long it will continue to run – I bet not long Wink

It’s lost 15% of its output from cold to being too hot to hold on to. Not bad for my book.

EDIT: 70:00 battery PCB cutoff Smile

Ok, that’s good. From now on it’s not recommended to gun it like that. Try to keep it within 20 mins will ya (that’s a long time actually). Best is not to go over 15 mins. These are budget lights, not CPF style stuff. Smile As you can see, under 10 mins there is not much heat sag at just 6% which is absolutely invisible to the eyes, that’s very good in my book for a > 2000L OTF. Its a apples – orange comparison, but try this with a SR90.

If you need more output or approx the same 1600L output for 1hr runs, get the X100.

mvyrmnd
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The good news is that while the light was cooking, the batteries stayed at a safe temp. No risk of Darwinism, just a dead light Wink

Also, the batteries came out at 3.05 and 3.00 volts. Remarkably well balanced for trustfire cells. I’m pretty happy all up.

I like to give things a hard workout out of the box so I know their limits. I’ve been around long enough not to hurt myself, but sometimes I do hurt the equipment Smile

Richie086
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2100 wrote:
How much current is the DRY NW drawing at the tail? Is it the older T5 4B NW tint offered first or the newer T6 3C NW?

I have forgottent how much my T5 4B is doing, if i remember correctly it probably is just 2100-2200 lumens or so.

Hi 2100, My DRY is the later version with the T6 3C NW with the auto-stepdown feature. With Redilast 3100’s, it would start as 3.65a and slowly climb from there.

Richie

2100
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mvyrmnd wrote:
The good news is that while the light was cooking, the batteries stayed at a safe temp. No risk of Darwinism, just a dead light Wink

Also, the batteries came out at 3.05 and 3.00 volts. Remarkably well balanced for trustfire cells. I’m pretty happy all up.

I like to give things a hard workout out of the box so I know their limits. I’ve been around long enough not to hurt myself, but sometimes I do hurt the equipment Smile

There were reports of dead drivers on DX and/or MF. Coz these drivers do regulate and boost up the current if you are on 2S, which can get pretty high. Do it often enough, and with heat, it can go.

For the DRY triple XM-L there is no issue, coz the drivers are only 5 bucks each. The KD “replacement” for this is 20 bucks, but you do get 4000L OTF!

It’s actually the same as say the SR3800. I have gunned this first triple XM-L light for over 20 times from start to finish to time the runtimes of all my cells, but cooled with water (head portion). Luckily i had XTAR 2600s in it failed (no light) and it presented a dead short. If it was some unprotected cells, my whole toilet would be finished. (maybe only the Panasonics NCRs would withstand a dead short). And this is not only the sole failure, there were quite a few more reported here.

MomentumExchange
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Wow, that’s £28.80 for me, the cheapest I’ve ever seen this

MomentumExchange
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mvyrmnd wrote:
Ok, I’ve used a lux meter app on my iPhone to get these results.

They’re relative, at least Smile

J12 on IMR : 735lux
J12 on Ultrafire: 705lux
Mac’s Customs 3300l (High CRI, warm tint): 600lux

Multiple readings were taken and averaged over a few minutes.

The 3300L costs literally 10x as much as the J12, has 9 XP-G’s at 1550mA each.

..and this makes me so happy to see! Not knocking the market of expensive custom torches but lumens are cheap – assuming conservatively that the modded J12 is 3700 lumens you are paying $1.70 for 100 lumens – I say this should become a benchmark for quantifying ‘bang-for-your-buck’ ..scientifically of course Smile

mvyrmnd
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MomentumExchange wrote:
mvyrmnd wrote:
Ok, I’ve used a lux meter app on my iPhone to get these results.

They’re relative, at least Smile

J12 on IMR : 735lux
J12 on Ultrafire: 705lux
Mac’s Customs 3300l (High CRI, warm tint): 600lux

Multiple readings were taken and averaged over a few minutes.

The 3300L costs literally 10x as much as the J12, has 9 XP-G’s at 1550mA each.

..and this makes me so happy to see! Not knocking the market of expensive custom torches but lumens are cheap – assuming conservatively that the modded J12 is 3700 lumens you are paying $1.70 for 100 lumens – I say this should become a benchmark for quantifying ‘bang-for-your-buck’ ..scientifically of course Smile

Actually, that was stock. I’ve just modded the light with the KD 5-mode driver and I’m now seeing 820 lux on half-flat batteries (charging them now for a full reading).

EDIT: I got a peak reading of 888 Lux on the Trustfire cells (the +ve spring on the new driver is too short to get a good contact with my IMR’s) fully charged. I have no idea if the lux readings are proportionate or go up in some sort of logarithmic scale…

Either way my 3300L is a conservatively estimated 2500L, and scores 600. Stock the J12 was 705 on these cells and is now 888, the HD2010 gets 235 Lux and my 55W HID spotlight gets 790. Make of that what you will.

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