Luminus SST-40, a N4 BA bin tested

Damn, I will have to see what comes in my order. I have some coming from both places, Kaidomain and Aliexpress. They were cheap and I want to practice de-doming.

I have made three separate order for 5 LED’s from Shenzhen Great Technology Co.,Ltd so far they all turned out to be SST-40’s :

I guess I just got lucky

If you zoom in look closely, yours have a black line my don’t. you got the real sst-40 and got fake sst-40.

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: