OSRAM CSLNM1.TG & CULNM1.TG 1mm², CSLPM1.TG & CULPM1.TG 2mm²

By the way, this is just to comment that if there is one led emitter which could benefit from a 4040 footprint, that is the 2mm² white flat or CULPM1.TG. Its about power density.

Hello, with Convoy l21a original driver at 6A the heat will be the same as the sst40? Or the osram 2mm produce more heat than sst40 at the same amps? I saw your charts and there is a Vf difference and of course the emitter area. Thanks

You will not see much heat difference betwern the leds if they are driven by the same driver at 6A. The power/heat at the led will be somewhat different but with the driver being lineair, the overal power/heat by led+driver combined will still be the same.

my concerns are about the temperature control using the 2mm and how it will be affected. the idea is to keep the ntc for extended periods on turbo/high without risk of malfunction, but at the same time, prevent a shut down by the ntc. Reliable flashlights for sale to regular / inexperienced customers, with better throw.

I removed the NTC and did stack the sense resistor to crank up the current to about 7,3 A
It gets nice and warm after about 5 minutes, but i havent used it for very long extended/continuous times, so cant say something about that.

What resistor value for 7.3amps?

R50 on top of the original R10

I would avoid buying from Kaidomain for the moment until I get a successful reflow myself for testing. The 2mm has a slight purple tint even at 4.5A. djozz is thinking it may have been a bad reflow. It could be an entire batch as all 6pcs have the same issue.

My 30pcs 1mm do the same thing at 4.3A so I’m selling at 3.5A (650 lumens) with stacked 7135 chips

Next purchase will be from led4power

I always remove the ntc since I had it step down at 35 degrees instead of 55.

You’d get roughly 8 minutes on Turbo before 7.3A hits 55 degrees at that point it drops to quite a low output.

Convoy’s drivers aren’t configured the best for this led.

I might use led4power’s drivers but they are expensive

So do you think whoever is doing white flat reflows at Kaidomain is doing a botchy work? @#$%, I have a couple lying around.

Will mount them on an old PC heatsink, set a small narrow beam TIR lens on top of the emitters, and proceed with some testing with my power supply and smartphone as ceilingbounce luxmeter.

I’ll see if I can capture it in a couple photos

I’m not 100% since this is the first time using white flats. I did attempt a reflow, a terrible one, and it was instant purple. It was the same tint but much worse, which feels like that confirmed it for me. It would have been a different story if it was blue but it was exactly the same tint

Ordered some lead solder paste to try again once it arrives.

Can someone tell me where to get centering rings for the Convoy C8+ using the 4040 1mm white flat?

Seems like this is much better than the 3030 version

To my knowledge, nobody is making them for 4040. You can ream a 3535 out to fit, which is what I’ve done in my lights

Did you get the 5400K version of the 2mm WF from kaidomain? This LED has a noticeable purple tint to it compared to the typical pure white WF.

Would you mind linking me to a 3535 so I know what to look for. Thanks

Yes, I did. Is this normal?

Maybe I should get djozz to test one to confirm it’s not an issue.

I believe it is normal. It is quite purple-ish, but the output is close to other pure white WFs I got from mouser. IMO the tint worked pretty good outdoors.

I appreciate your input, thank you

At 6.5A I was getting 1200 lumens and 7.3A 1170. Looks like around 7A is the limit for KD 2mm

That is very similar to the smaller LEP light with 250K.

If I pay someone to mod a Jaxman Z1 - will I get similar results ?

It would be cool to have a Turbo[4 min runtime ] and a near turbo ( 15 minute run time] Medium high and Low and moon mode

2] Bonus question- what about the twist zoom glass aspherics they use for cheap infrared lights T20 T38 etc?