Cree XM-L vs SST-50

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cmacclel

Flashlight Enthusiast
Joined
Jul 15, 2003
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5,018
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Sweden
-Same Host

-Same Reflector

-Same Driver (2.8a Max on High)

-Same Battery (Voltage Verified)

-Top LED Bins both rated at 6500k

-XM-L on Left SST-50 on Right





P1050434-vi.jpg


20mm Reflector

P1050447-vi.jpg


Heatsink

P1050439-vi.jpg




1/13 Second Exposure

Low 150ma

P1050440-vi.jpg


Med 1000ma

P1050441-vi.jpg


High 2.8 Max

P1050442-vi.jpg




1/60 Second Exposure

Low 150ma

P1050443-vi.jpg


Med 1000ma

P1050444-vi.jpg


High 2.8a Max

P1050445-vi.jpg
 
There's a good bit of information missing due to the great forums crash of 2010. The bottom line is that the SST-50 is less efficient than the XM-L at the same drive current, but, the SST-50 can be driven harder so it will put out more lumens once you get past about 3500-4000mA of current.

My personal experience with these two emitters is with a 2.5A Dereelight pill meant to be used on the DBS. I bought mine with the SST-50, installed it into my light then had it measured. It put out somewhere around 475 lumens. I then swapped the emitter to an XM-L T6 and the lumens went up to around 550 OTF. Same flashlight, same driver, same batteries (actually, on the same charge, 15 minutes later after doing the emitter swap). These numbers are from memory.
 
I see... I bought mac's mag drop in with the xm-l and glad I did since the drop in are only pushing 2.8 amps max according to specs! I can't wait!!
 
XM-L FTW!!! Really though, PCC got it right... The only advantage of SST-?? LEDs is their ability to handle higher current, thus > lumens in the high range at the cost of efficiency at all current levels.
 
hmmmmm. i've been considering getting an SST-50 drop-in (3 level) with a high of 4.2A

sensible or not?

edit: for what it's worth i was also considering the same levels for an XM-L drop-in. So the SST-50 will be a better performer at this, at least on high?
 
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tobrien said:
hmmmmm. i've been considering getting an SST-50 drop-in (3 level) with a high of 4.2A

sensible or not?

edit: for what it's worth i was also considering the same levels for an XM-L drop-in. So the SST-50 will be a better performer at this, at least on high?
Click to expand...

Yes...these guys can be pushed pretty hard. SST-50 is like the Cadillac of medium-sized emitters. I like both emitters but XM-L's are a lot cheaper for the lumens.

Speaking of drop-in's here's my rendition of it for a customer's solarforce: Noticed mines is on the right and the stock one is on the left? The driver and LED on the left one is completely fried due to bad heat management.
IMAG0506.jpg


EDIT: That pill on the top-left is for a Crelant 7G5 V2 but made specifically for an XR-E emitter. A shame that thing went with the light when sold a few months back.
 
Last edited:
Tiresius said:
Yes...these guys can be pushed pretty hard. SST-50 is like the Cadillac of medium-sized emitters. I like both emitters but XM-L's are a lot cheaper for the lumens.

Speaking of drop-in's here's my rendition of it for a customer's solarforce: Noticed mines is on the right and the stock one is on the left? The driver and LED on the left one is completely fried due to bad heat management.
IMAG0506.jpg


EDIT: That pill on the top-left is for a Crelant 7G5 V2 but made specifically for an XR-E emitter. A shame that thing went with the light when sold a few months back.
Click to expand...

gotcha, thank you!

i had no idea the pill in the 7G5 V2 was intended for XR-Es, how'd you figure it out?
 
tobrien said:
hmmmmm. i've been considering getting an SST-50 drop-in (3 level) with a high of 4.2A

sensible or not?

edit: for what it's worth i was also considering the same levels for an XM-L drop-in. So the SST-50 will be a better performer at this, at least on high?
Click to expand...

I have two Oveready M2 setups, sst-50 and xm-l (mod of a M2-50 by torch lab, part of Oveready folks), direct drive 5+ amps, neutral. I love the sst-50 but the xm-l is brighter, not by much and some of it may be tint related. Both are pretty much fantastic.

I really like the set-50, I say go for it.
 
tobrien said:
i had no idea the pill in the 7G5 V2 was intended for XR-Es, how'd you figure it out?
Click to expand...

Because I built that pill myself :D The whole thing went poof after 2 weeks. Very Very hot and the emitter melted along with the bond wires. It was great to see something that can throw almost a mile away. But as of today, I forgot the exact dimensions of the pill so I cannot replicate one.
 
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