BLF style 18650 1s thrower( poor mans Olight M2X)

luminarium_iaculator · 2017-06-14T10:59:52.000Z

djozz:

Hmm, I shall be more precise: it is good for flashlight lux measuring with keeping the errors in mind. Folks on BLF tend to attribute meaning to measurement differences between people that are under 5% while errors between luxmeters can very easily be higher than that.

Could measuring errors between same batch of lux meters vary a lot? Like lets say those mentioned uni-t lux meters we ordered?
We have some kind of frame now where we can compare particular cheap lux meter to your professional one.

BTW did you test your sup osram black flat modd with uni-t lux meter? I am really curious what it will say.

djozz · 2017-06-14T11:31:51.000Z

I would expect that all these Uni-T meters have the same sensor and filter so the wavelength error should be the same. Assuming that also the calibration was done with some care (calibration should be an easy step) then yes, I would not expect a lot of variation.

But please notice the use of words like would. should and assume in the above text.

I did not check the Black Flat because it is in a direct drive flashlight that has a sloping output which makes comparing luxmeters extra difficult. Instead I used all regulated flashlights with almost flat output. But I could have a go at testing the Uni-T meter with the Black Flat anyway.

luminarium_iaculator · 2017-06-14T14:38:57.000Z

djozz:

But please notice the use of words like would. should and assume in the above text.

Even life is not for sure But we hope it will be

Tom_E · 2017-06-14T15:50:21.000Z

Nice djozz!

I got in those Manker 28 mm's back in December - gotta measure them.Can't recall.

djozz · 2017-06-14T19:29:40.000Z

MRsDNF:

Good info djozz. I’d suggest that this is worth its own thread.

Thanks! Perhaps it should have been in a dedicated thread. At least I added the post to my djozz-tests page.

luminarium_iaculator · 2017-06-16T11:00:36.000Z

I received UT383 light meter today. Well it does not have X10 or x100 function but it has FC function. Footcandle is 10.763910417 of lux.

I also have TES 1335 light meter that it started under reading for about 20% probably cause my 40 kilo kid had stand on sensor. So suddenly all my lights dropped in lux for 20%

Now I will report results with new UT383 meter which are more than terrible. Measured in lux and in FC at 7 meters distance. My modded supwildfires with good old XP-G2 S4 2B from this thread.

240kcd vs 260kcd(TES 1335 light meter)
260kcd vs 280kcd(TES 1335 light meter)

Assuming that possible –5% under reading like in Djozz test on de domed emitters and if I add +5% on given results it would be like 252kcd and 273kcd.

So I am so confused and a bit angry because of all mentioned…

If I will stick to my old meter which costed around 150$ and add +20% results I had before accident than it is very possible that I have 336KCD and 312KCD Supwildfire light.
But If I will stick to new UT383 meter results, and that is 240 kcd and 260kcd for super throwy old XP-G2 S4 2B emitter than I claim that results from that new meter are very unrealistic for mentioned emitter since some guys here reported that kind of results for XP-L and one guy even reported 300kcd for new xp-g2 s4 2b and I don’t even have to say that old xp-g2s42b should throw much further than any XP-L, L2 or any new G2 emitter.

Anyway and imho lux meter reading variations from meter to meter can obviously vary a lot. Maybe even for more than 30%

So from my redneck test I would not recommend this UT383 lux meter. Seems it gives very unrealistic results.

djozz · 2017-06-18T22:10:59.000Z

As requested by l.i. I checked the throw of two more flashlights with the Uni-T meter compared to the Mobilux meter. And the results underline (found that in earlier tests of cheap luxmeters as well) that the difference in the optic filters between the two can lead to fairly unpredictable differences in the reading of different leds, it is not just the colour temperature that makes the difference, other differences in the led spectra have significant impact on how different the Uni-T meter reads from the Uni-T meter.

Because both flashlights are direct drive and thus have a sloping output, I took a Mobilux reading at 30 seconds (which gives my standard throw number), then in the same session a reading with the Uni-T and then a second reading with the Mobilux to check what speed the output decrease was.

Mitko thrower with Oslon Black Flat led :
Mobilux at 30 seconds: 344 kcd
Uni-T : 359 kcd
Mobilux again : 338 kcd

Brinyte B158 with old type XP-G2 S4 2B :
Mobilux at 30 seconds: 313 kcd
Uni-T : 272 kcd
Mobilux again : 301 kcd

So I think l.i. can breath again, when measuring the throw of a dedomed XP-G2 S4 2B in an aspheric flashlight, my Uni-T UT383 luxmeter measures lower than the Mobilux luxmeter, if use the average of the two Mobilux readings, the difference would be –11.4 %.

The Black Flat from a reflector light on the other hand measures a bit high, +5 %.

For illustration, the two hotspots (flashlights at 7 meter distance) next to each other. The aspheric hotspot is not as yellow as appears in this pic btw.

luminarium_iaculator · 2017-06-19T07:07:48.000Z

Thanks Djozz,

Thank you very much

I did more various tests with mine but this time on shorter distances 5 meters and I found that results vary a lot…

I will take weakest mitkos thrower reflector I made for example with fully charged Samsungs inr 30Q after 30 seconds as you said.
First measuring on 5 meters Showed 247 kcd and after each measuring Uni-t turned off-and on again;
second one 225
Third one 233
Fourth 245
So each time different results on lux reading setting of same light meter.

Than I tried FC function on lux meter and it showed significantly higher results after calculating 1fc= 10.76391 lux

First 267
Second 250
Third 258
Fourth 248

So I guess that readings can vary with this light meter and it seems it reads slightly higher with FC function on (I don’t know if you tried that Djozz)

polarweis · 2017-06-19T15:30:30.000Z

I would like to mod this light too but i’m kinda a newbee to the modding scene…
What kind off stuff do i need to mod this light? I didnt really understand the lowering part of the led that was written in the OP.

Thanks.

Jerommel · 2017-06-19T15:34:32.000Z

polarweis:

I would like to mod this light too but i’m kinda a newbee to the modding scene…
What kind off stuff do i need to mod this light? I didnt really understand the lowering part of the led that was written in the OP.

Thanks.

First of all, replace the driver and the LED.

For the rest, about focussing and making things fit, this topic shows various ways to do it.

polarweis · 2017-06-19T16:29:52.000Z

Thanks for your reply. As i understand it the led should be closer to the reflector?
And will a xpl hi be good for the best throw or rather have a g2?

Jerommel · 2017-06-19T16:36:31.000Z

polarweis:

Thanks for your reply. As i understand it the led should be closer to the reflector?

Correct.

And will a xpl hi be good for the best throw or rather have a g2?

XP-G2 de-domed will give you a very narrow beam with this reflector.
Maybe too tight for you to be useful (without binoculars).
I put in a XP-L HI and i quite like it like this.

polarweis · 2017-06-19T23:27:02.000Z

I will first mod a convoy c8 to practice with
But i will order this anyway so i have it ready.

Mitko · 2017-06-19T16:46:28.000Z

The best choice for this reflector is a dded XML or XPL: i`ve modded another one today this way, with a good U4 1A and a fet driver plus everythign bypassed it came out exacly 245k cds at 5.2 amps: running with a VTC 6 battery

XPL Hi would never ever give you 250k mcds …and we are BLF-ers, lets leave Hi for CPFers pls

They are using a relatively good black emitter bracked now so you can use it by default

Unfortunately the default emitter is a total garbage, not like the first ones i got

yet, the host is great, the results are exacly the same that i got with a good modded B 158

P.S
A dded XPL would give you a little bit more actualy yet it starts at 6+ amps usualy,

Jerommel · 2017-06-19T17:15:54.000Z

Mitko:

XPL Hi would never ever give you 250k mcds …and we are BLF-ers, lets leave Hi for CPFers pls

Is that BLF snobbery now?

Mitko · 2017-06-19T17:57:36.000Z

More or less reality m8

As i mentiuoned this many times here, HI emitter has a sillicone burn issue on a long term base when driven at high currents, especialy < 5000k bins
Plus its a low performer .
Plus we are BLFers, its a shame not to dedome a XML or XPL in that host, or XPG…

Actualy CPF way is to get a M2X and pay aditionaly 100$ for a high class modding

polarweis · 2017-06-20T10:10:59.000Z

How much mm driver and mcpcb do i need for this light?

djozz · 2017-06-20T10:16:00.000Z

Mitko, have you checked the SST-40 for a thrower yet? (my test here)

Mitko · 2017-06-20T10:59:02.000Z

Not yet djozz , waiting for them to arrive( ordered them from Arrow)… i suspect that Luminus are using Cree cores… as you know Cree are selling massively cores only…
Yet, a well driven U4 1A beam profile looks even better than the default Olight M3X one with the same intensity

I had a talk with the seller( a nice chinese woman as it seems) , however she speaks only business english, she understands only about quantity and price per pc and cares not for hosts

P.S
The only Eu led emitter factory using mainly Cree cores too.

Its 40 kms away from me so i visited them many times , they do some OEMS for Bosch, Phillips, even Cree! I wonder how they stand the CN yet they do, at least for now

giorgoskok · 2017-06-20T11:17:17.000Z

Mitko:

Not yet djozz , waiting for them to arrive( ordered them from Arrow)…

What bin did you order ?