Luminus SST-40, a N4 BA bin tested

Flashlight Modding and DIY Parts
221

So, about Toluene.
Want to get some so I give it a look and guess what, there is a local company making this stuff, I was excited, could it be, source in my own town! Picked up the phone, give them a call, yes they produce it, yes they sale it but I can’t buy it because they don’t have retail store, and they don’t want to give me info which company buys from them and has retail store so I could contact them.
Bloody bureaucracy :rage:

222

What is the best forward voltage bin for this led for flashlights with the A17DD or X5/X6-driver?

Forward voltage bins for sst-40

As giorgoskok wrote, the sst-40 specs from aliexpress store: Shenzhen Great Technology Co.,Ltd.

Flux : N4
Color : BA
Voltage: VK (min: 2.9V max: 3.1V)

You see that there are 2 bins lower then the VK bin and I guess if you use those with DD-FET driver you get more Amps (if I understand this correctly) then the VK bin but that means more heat.
Are those VH and VJ bins better (more Amps = more light) or are they so good they get worse (to much amps = to much heat and the led burns)?

Edit: removed a picture as requested (couldn’t they just go to Kaidomain’s site and copy that picture instead?)
.

223

I see that Kaidomain’s Sst-40 have the VJ bin (Min: 2.7V Max: 2.9V).

Anyone who have both the aliexpress sst-40 (VK bin) and the Kaidomain’s sst-40 (VJ bin) that have made a comparison?

.

224

It would be better not to post the pic of the reel here EagleShield !

Thanks

225

Why?

226

In the past sellers have goten pics etc from forums (+ it appears in google pictures) etc selling fake leds and more.

227

OK…

228

At least happened to me once from ebay seller :money_mouth_face:

229

Removed it :slight_smile:

.

230

The SST-40s from Aliexpress come on PCBs.
Are those PCBs total junk, just bad or mediocre?

231

Got a link?

232

https://www.aliexpress.com/item/10PCS-Luminus-SST-40-10W-LED-1100lm-Cool-White-7000K-instead-of-CREE-XML2-XM-L2/32804792539.html

233

Yeah, those are crap. No copper, just aluminum. Get yourself some noctigons from hank! :+1:

234

Aluminum isn’t a top performer, but isn’t bad either. If these are DTP, they should be passable for cheap lights….and Kaidomain PCB + LED costs about the same as Aliexpress LED (when buying 10) + Noctigon. Similar DTP, but Aliexpress diodes are factory rejects of random bin and with KD one knows what they buy. There is an intermediate option of using KD PCBs ($1.5/piece) with Aliexpress emitters though.

235

Wasn’t it that seller someone reported to sell fake sst-40? (When buying small amount it was the real sst-40 that came but when he did a bigger order and he got fakes?)

I don’t have seen anyone reported the other seller (Shenzhen Great Technology Co.,Ltd) to sell fake sst-40.
I asked them to sell only the LEDs because their PCB is crap and it can’t handle the heat when pushed hard.

I got this response:

hi dear friend
I just sell it with pcb .Because some customer brought it back and they don’t know how to make it on the pcb.Then they open the dispute .I have no way deal with it .So i just sell it with pcb now
I hope your understanding
Enjoy your day
Jacky

So I checked the store and they sell Xhp70 and xhp35 Hi without their crappy PCB.
So I wrote another message and told them that and what they wrote in the last message don’t add up.

Got this reply back:

hi dear firend
I sell the sst-40 led only with pcb .NO bare led for sell .
BR
Jacky

So still little fishy…
Why won’t they just cut the amount of LEDs from the reel and sell? Should be much easier.
Only option I can think of why they would not sell any loose LEDs is because they already put them all on their PCB stars.
But then why not just write that to me instead of making up that story?

I bought 1 of every size PCB with the sst-40 (I think).
Buying from aliexpress is like opening Christmas presents. You never know what’s in it.

.

236

Well it depends. If you’re going direct drive (where the sst-40 really shines) a copper mcpcb is a must.

237

Thanks for correction, the right seller is:
https://www.aliexpress.com/store/product/10PCS-100PCS-Luminus-SST-40-10W-LED-1100lm-Cool-White-7000K-instead-of-CREE-XML2-XM/1966839_32819284669.html

238


With SST-40 driven with FET you can pretty much extrapolate the chart right, so the difference will be higher. Nevertheless, alu will do the job.

239

If I understand that chart right it’s only the Mcpcb with DTP that will do ok?
The common alu mcpcb will get to hot and fry the led when driven hard?

I don’t think those mcpcb stars they sell on aliexpress have DTP.

240

Yes^3