Mr.Lite J4 XM-L Mod

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Don
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Mr.Lite J4 XM-L Mod

I'd accidentally dedomed the LED that came with it. So when an XM-L LED on a 16mm star arrived it seemed a natural mod. The XM-L and the plastic TIR optic didn't get on together so I pulled the reflector assembly from a Trustfire TR-801 I had lying around. Beamshots to follow once i sort out some niggling continuity issues.

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

Huny74
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Man, you're really losing no time with your new toys hi-tech precision devices!

I still have a DX XP-G R5 from september lying around here and waiting to become part of a headlamp I yet have to build Big Smile

Don
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I have several R5's unmounted too. One day I'll get around to doing something with them.

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

Don
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Currents

1850mA High

1110mA Medium

430mA Low

 

Oddly, it appears to have become a three mode light.

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

Don
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Still some niggling continuity issues, but this thing is bright!

As in:

High:       389 Lumens from 1.85A or about 6.66 watts so around 58 lumens/watt

Medium:  249 lumens from 1.11A (at a nominal 3.6V) 4W so around 60 lumens/watt

Low:        97 lumens from 1.5W so around 63 lumens/watt

 

Definitely the brightest 14500 light yet!

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

Budgeteer
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Wow, but now your low is as bright as a good AA light on hi.

kragmutt wrote:

They're gonna send you a green redcat with a black LED.

Don
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It is a little excessive. And it is still as big as an 18650 light - Mr.Lite seem to make their lights pretty large - but as a wow! light it will be fun. Wonder if it will even light up with an NiMH now? Time to find out. It works and gives all 4 modes.

H: 2200mA

M: 1320mA

L: 420mA

VL: 170mA

Output is around 500lux on medium with an Eneloop - around 90 lumens. Still have some very annoying flickering though.

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

arenat
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Great mod, can't wait to put one of these in the RC-G2 at 1,75 or 2,1  ..

The Vf of this emitter is much lower than the others, 3,35v at 3A at 1,85 could be 3,2 V

Don
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Just threw it together because I could. Took a fair amount of effort in the end. Something as throwy as an RC-G2 isn't best suited to this mod. I also replaced the optic with a reflector that worked better. I hope the G2 reflector works with it. I certainly expect it to kill the driver eventually, it is seeing a lot more current than it expects.

 

The RC-G2 is a light i really want to like, but completely fail to do so. All of them I've bought have been given away. An XM-L in it might well make it a better light for me.

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

old4570
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Of doing the same thing , only I didnt think the Lens would work with it .. Hmmm interesting ..

Flickering would be poor contact somewhere ... 

Look forward to beams etc .. Output seems a little low for current though .. Is it sagging ?  

 Always remember , the easiest thing in the world to do , is to expel hot air from your lungs and through some vocal chords ..
The resulting sound may , or may not be worth listening too ….

 

Don
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Till I get the contact issues sorted, it's hard to say. It is also rather less efficient than it ought to be at what I assume the drive current is. It does get hot. To get the best out of it, I'd need to swap the driver. The output suggests about 1200mA getting to the LED. But the driver is pulling 1.85A from a 14500 so it is clearly having to dump a lot of current as heat.

I have swapped the plastic optic for a reflector. The one out of the Trustfire TR-801 fits without modification. The optic works well enough in the TR-801.

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

Don
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In an effort to sort out any and all continuity issues, I now think the strobing is some sort of driver issue because I get it with the pill pulled out and wires from the cell to the rear contacts. I really ought to get myself a bench PSU for such tasks.

 

Anyway, to the switch. It is a slightly unusual assembly held together by some sort of rubbery goo which you will break removing the switch.

Switch guts

 

The switch has a spring below the metal post that makes contact with the negative pole of the cll. This spring pushes the guts apart. Still trying to stick it back together.

Switch internals

 

The right-hand assembly is pushed apart by the spring. Time to get the hot glue gun out.

more guts

 

Here's the other end.

business end

Head innards

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

pipopopo
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I am curious about the beamshots and I feel sorry for your 14500 batteries

edit: I just tried a full 14500 in a modded with XML light it is also running @ 2A

(with a 18650 I get 3,5A)

Don
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At the moment, the driver just wants to strobe the light at me so it is difficult to do beamshots. I have a BLF variant of the J4 with a bored body so I can put a 17500 in it so I've been using the switch from that for testing purposes. Here's a rather poor beamshot with an Eneloop. The camera was in one hand, the light in the other. This is about 90cm from the wall.

Wallshot

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

Budgeteer
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A variation to the infamous orange peel wall eh? The photo look decent. Knowing it was with a eneloop it's even better!

kragmutt wrote:

They're gonna send you a green redcat with a black LED.

Don
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Finally, some beamshots. For some reason it is refusing to work with 14500s just now, the driver just strobes it. However, it will work with an NiMH cell and give all four modes. It would be a lot brighter with 14500 but the driver isn't playing nice. Will need to ask some of the people who understand these things to see if there is any sensible mod or repair to fix this.

 

Control

Control

 

XL

XL

 

L

Low

 

M

Medium

 

H

High

 

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

Don
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Finally it decided to work properly with a 14500. It is of very similar output to the Mr.Lite LT3. It is less throwy though.

Here are the numbers with a 14500.

 

    Lightbox lux Lightbox lux Lightbox lux Est. Lumens Est. Lumens Est. Lumens Throw at 1 metre lux
Light Battery Turn-on 30 secs 2 Minutes Switch-on 30 secs 2 Minutes  
Mr.Lite J4 XM-L Mod High 14500 2170 2000 1840 389 359 330 3850
Mr.Lite J4 XM-L Mod Low 14500 601 597 590 108 107 106 1140
Mr.Lite J4 XM-L Mod Medium 14500 1489 1401 1350 267 251 242 2750
Mr.Lite J4 XM-L Mod Moonlight 14500 33 34 34 6 6 6 62

 

And here are the LT3 numbers

    Lightbox lux Lightbox lux Lightbox lux Est. Lumens Est. Lumens Est. Lumens Throw at 1 metre lux
Light Battery Turn-on 30 secs 2 Minutes Switch-on 30 secs 2 Minutes  
Mr.Lite LT3 Mode 1 IMR 16340 219 214 213 39 38 38 771
Mr.Lite LT3 Mode 2 IMR 16340 423 418 407 76 75 73 1550
Mr.Lite LT3 Mode 3 IMR 16340 1232 1160 1110 221 208 199 4700
Mr.Lite LT3 Mode 4 IMR 16340 1787 1637 1568 321 294 281 6490
Mr.Lite LT3 Mode 5 IMR 16340 1864 1727 1645 334 310 295 7370

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

Don
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The LT3 is on the left, the J4 mod on the right. Will do some outdoors beamshots in a minute.

Mr.Lite LT3 and Mr.Lite J4 XM-L Mod

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

Don
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These are a longer exposure than usual. I think that 6 seconds is probably too long but it allows me to stop the lens down a bit for better depth of focus when the camera can't make up its mind as to what to focus on.

Control

Control Shot - overcast night

 

J4 XL

Mr.Lite J4 XM-L Mod XL

 

J4 L

J4 Low

 

J4 M

J4 M

 

J4 H

J4 H

 

LT3 Mode 1

LT3 1

 

LT3 Mode 2

LT3 2

 

LT3 Mode 3

LT3 3

 

LT3 Mode 4

LT3 4

 

LT3 Mode 5

LT3 5

 

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

Don
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Animated Gif

J4/LT3

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

mizjif
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whoohoo! I just did my first DIY project ever. Swapped a xm-l on a 16mm star into my mr.lite J4. Also am using the reflector from the trustfire tr-801. The light is absolutely awesome in output and all of the modes work perfectly. The light heats up very fast on high, but I trust that is a good thing. 

At the tailcap on high, it is drawing 1.5A from a protected flame trustfire 14500. This thing is a sweet little pocket rocket. 

 

I am excited to do my driver swap/ xm-l swap to my tr-801 now. Uh oh. I have discovered the other side to this hobby. Not just buying/collecting, but actually modding and fiddling with them. Makes it much more enjoyable and rewarding!

Don
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I bought some IMR 14500s for mine. I'd strongly recommend you do the same.

Mine is drawing more than that, but much over an amp from a 14500 is more than I prefer to pull.

Runtime isn't great but if you carry a dozen or so lights, who cares....

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

Match
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mizjif wrote:

whoohoo! I just did my first DIY project ever. 

Congrats on your first mod!  Sounds like it turned out great.  Careful, modding is addicting Wink

mizjif
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Thanks! When I was done I put a KD 2800 mah driver and an xm-l into my tr-801 Big Smile wow. It's drawing over 2.86a and wow. For it's size, it is impressive to say the least!