Luminus SST-40, a N4 BA bin tested

Did you get yours from Shenzhen OT-LED Technology Co.,Ltd, or Shenzhen Great Technology Co.,Ltd ?. Your link points to Shenzhen Great Technology but the text says Shenzhen OT-LED Technology Co.

I got from Shenzhen OT-LED Technology Co.,Ltd. “Sorry” I link it wrong! I corrected back already. where did you get yours?

Maybe even fake are as good or better than original ones. Please check them.

I test eight of them so far they all 8 bad!

On my clamp meter fake one read 4.90A and the one from kaidomain 7.71A, same host same battery and same driver.

Sorry to go off the current topic, but can anyone comment on thermal efficiency? Assuming the same wattage, will these get hotter than the comparable Cree?

I got mine from Shenzhen Great Technology Co.,Ltd

maybe that’s why! I wish I got from Shenzhen Great Technology

The lower Vf of the SST-40 should mean it is more efficient than the XPL. These emitters produce roughly the same amount of light at a given current, so the ratio of the Vfs at a given current will give the relative efficiency. The SST-40 is about 15% more efficient meaning it converts more of the input power to light rather than heat.

So at a given current the light output is the same, and the input power and heat production is less for the SST-40. At a given wattage the SST-40 produces more light (more current), and produces less heat.

Thanks EasyB.

So real-world example. I was running 4P XHP35 through a FET on 4S 18650. It was really bright, but the host couldn’t handle the heat. I’m guessing these would get me around 2,000 lumens less, but possibly similar lux and less heat? (in 4S instead of 4P, obviously)

I want to order a couple, Is Kaidomain selling real ones? Thanks!

I have five from Kaidomain, they are real!

Sounds about right. Though these will pull a lot of current so it will still be a lot of heat. But unless you use a good buck or boost driver you won’t see the efficiency gain over XPL V6. I think the real advantage of these over the XPL V6 is their ability to be driven harder in a direct drive situation.

Thanks tm07, ordered some! :beer:

WhT host are you using?

thank you djozz for taking the time and effort for doing this tests, you are a wiki to me plz dont stop

Thank you 1000 times

We have something in common gamezawy. :slight_smile:

I got my SST-40s that I ordered from Shenzhen Great Technology on AE. All three appear to be the real deal. I also got one from Kaidomain and it is also a real SST-40.

There are some slight imperfections though. The one from KD and one of the Aliexpress ones are slightly raised. Probably not enough to be a concern since there is still solder under the center of the emitter. I will probably try to get the Ali one seated correctly since I plan on driving that one harder than the others. The DTP copper feels soo much nicer compared to the thin aluminum boards the others are on.

Dave G is this the seller you bought your leds from him ? Store:Shenzhen Great Technology Co.,Ltd.

About heat:
I tested in a convoy C8 host samsung 25R battery, 10x7135 3500ma driver and with xpl HI the light got 60°C after 15 minutes.
Same everything with SST40 I got 61°C.
The XPL HI output with full battery is 1056 lumens and the SST40 I measured 1122 lumens.