LED test / review - OSRAM OSLON Black Flat HWQP - still highest luminance of all LEDs to date!

koef3 · 2018-06-20T23:56:22.000Z

After some weeks of extensive testing and many test runs I managed to measure differences in light flux and Vf depending on Tj / Tsp. :)

I put a lot effort to make the thermal resistance from emitter to heatsink as low as possible to avoid errors.

For the next upcoming emitter tests I will publish also diagrams / measurements like this.

Enderman · 2018-06-21T00:54:40.000Z

Did you use a peltier to get below ambient?

djozz · 2018-06-21T05:55:05.000Z

:sunglasses: :+1:
That will get us another important piece of information about abusing our leds.

koef3 · 2018-06-21T18:35:32.000Z

Enderman:

Did you use a peltier to get below ambient?

Yeah, peltier. But it’s not the best way to regulate emitter temperature.
But for now the results are pretty decent and usable. Maybe I build a ‘better’ testing rig in the near future…

Enderman · 2018-06-21T19:07:27.000Z

The_Driver1 · 2018-06-21T20:27:02.000Z

Very, very nice! Thanks!

The_Driver1 · 2018-09-09T10:41:29.000Z

Here is a relative brightness measurement of my Project Excalibur light with a Black Flat @ ~4.5A on copper pcb screwed on a (hollow) copper rod in a large aluminium host in a closed cupboard (so the air was not moving much and slowly getting warmer). I did not cool the light in any way and let it run for the entire 1.8h.

The LED is being run at it's absolute maximum brightness. The problem is that this was determinend under almost ideal conditions on a large, cold heatsink. As the light slowly warms up, the brightness decreases by a lot. There is definitely a bottleneck though, the decrease in the first 10min is way too big imho. I also have to say though that this is my first light where the LED is actually being driven at its absolute maximum. That could make a big difference.

koef3 · 2018-06-22T22:05:18.000Z

There are no pictures?!

The_Driver1 · 2018-06-22T22:13:33.000Z

koef3:

There are no pictures?!

Of the light? It’s linked in my signature. I don’t want to clutter your thread.

koef3 · 2018-06-22T22:18:30.000Z

The_Driver:

Here is a relative brightness measurement of my Project Excalibur light

Were is this here? ;)

This is what I mean earlier...

The_Driver1 · 2018-06-22T22:22:24.000Z

koef3:

The_Driver:

Here is a relative brightness measurement of my Project Excalibur light

Were is this here? ;)

This is what I mean earlier...

www. taschenlampen-forum.de/media/projekt-excalibur-regelung-ohne-kühlung.25651/full

(remove the blank space after www.)

koef3 · 2018-06-22T22:27:57.000Z

Ok, thanks. :) This picture is not visible in your post earlier. Has the pic supposed to be there?

Maybe you could using an external image hoster to avoid such problems?

The_Driver1 · 2018-06-22T22:35:27.000Z

koef3:

Ok, thanks. This picture is not visible in your post earlier. Has the pic supposed to be there?

Maybe you could using an external image hoster to avoid such problems?

I don’t like external image hosters.
Can you see the pics in the lights thread? They are all hosted on TLF. Many people can see them, as can be seen in the comments. Even google has already found this pic.

koef3 · 2018-06-23T16:52:53.000Z

Raw data

Osram Oslon Black Flat HWQP

Amps lm Vf
0,20 84 2,76
0,40 156 2,85
0,60 214 2,90
0,80 270 2,96
1,00 321 3,00
1,20 367 3,05
1,40 416 3,09
1,60 461 3,13
1,80 504 3,17
2,00 541 3,21
2,20 580 3,25
2,40 619 3,29
2,60 652 3,32
2,80 686 3,36
3,00 716 3,39
3,20 746 3,43
3,40 775 3,46
3,60 802 3,50
3,80 825 3,54
4,00 847 3,58
4,20 867 3,61
4,40 883 3,65
4,60 900 3,69
4,80 913 3,74
5,00 924 3,78
5,20 932 3,83
5,40 936 3,88
5,60 937 3,94
5,80 934 4,00

If you create diagrams / comparisons with this data, I would ask you to publish these charts in this topic and also to specify the source of the data used.

Raw data of more emitter tests will follow in the next time. Stay tuned!

The_Driver1 · 2018-06-25T23:03:12.000Z

Can you also upload the data for the Cree XP-G2 S4 “old” that I gave you? I would really appreciate that!

The_Driver1 · 2018-09-09T10:02:11.000Z

In May Osram released a new version (1.10) of the datasheet. The performance of the LEDs has been improved. There is now a higher maximum bin (12.5% brighter) and the lowest one has been removed. This should lead to a higher maximum luminance.

@koef3: can you also post the data of Cree XP-E2 Torch de-domed?

ChangchungLeds · 2019-08-03T14:26:47.000Z

Hello guys. Can someone please point me in right direction? I need to drive 3 of this Leds in serie. What will be the best option best driver? Thanks in advantage

DesertSnake · 2023-01-11T10:27:44.000Z

Has anyone tested these 2, they seem to be very similar to this HWQP ??

ams-osram

OSRAM OSLON® Black Flat S, KW HHL532.TK White LEDs - ams-osram - ams

Learn more about the OSLON® Black Flat KW HHL532.TK LED, which meets a wide range of requirements. This SMT device is very stable, durable and can be used with standard processes.

https://ams-osram.com/products/leds/white-leds/osram-oslon-black-flat-x-kw-hhl631-tk

koef3 · 2023-01-11T11:44:25.000Z

I have these LEDs in stock, I hope that I can test these emitters soon.

DesertSnake · 2023-01-11T13:53:18.000Z

Cool! Thank you!