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like this”:8x 18650 SRK is built
Disappointing news: Q bin doesn't exist.
I’m supprised that Luminus has not built a more efficient replacemnt for the SST90 yet to stay in the efficency game with Cree.
They may not be able to. And their niche in the market may have been taken over by cheaper chips from other manufacturers making expensive research not paying off.
(just guessing away)
If you look at big buyers around my place they buy tens of thousands of small Osram or Phillips Lumileds, brand name still matters. Some people that were actually fitting big stores with LED lighting had no idea who CREE is (as strange as it sounds), I guess Luminous is out of discussion for most of business that want to impress a store owner with well known brands. Same can happen with street lighting when companies bid to the city administration. I guess Luminous may not have the cashflow of those big corporations.
To add to the luminous discussion, I think the low vf, high amp led were hard to sell since it was a little pricey for a single led AND also needed a comparatively pricey driver to get the maximum potential out of it. Even for flashlights, when the sst technology came out there was little technology to support the big amp draw. It seemed luminous leaned towards fixed lighting and projection lighting to cater for the unusual limitations of the led (including heatsinking). Luminus had good tech at the time it was released and understood good heatsinking was priority (being so high amp/high power) that’s why they came out with the copper mounted cbt/cst (don’t know if it still had the dielectric layer though).
They HAD a good led. It just didn’t seem to fit neatly in any market. To keep researching and developing for more efficiency would be misguided IMO.
These things are so bad I’m just gonna have to toss em in the trash can when they get here… 
Sarcasm, right? Or toss them in my direction. 
I imagine they’ll do ok, might not be the “best” but certainly won’t be the worst either.
I’m gonna have to re-read this thread when they get here to figure out what I intended to do with em.
I REALLY like the look of the SBT-70, with it’s round die face and glass covered flat surface. Might end up with one of those as a mule somewhere, really would like to use it in a very small light I have in the que. Just don’t know if the small cell it will take can supply enough power to it to make it all worthwhile, as they’re expensive!
Dale, I look forward to your results with this emitter. I know you've got the cells, the copper, the drivers, the lightbox, and most importantly--the guts to push this emitter to the limit and then post the results here! 
+1
Hmmmm, I’ll have to report this to my parents. What they’ve been calling lack of sense, you refer to as guts. One sounds better than the other…
Pioneer.
Trailblazer
Buying American (doesnt matter if its not true)
you need to weave these phrases into your narrative.
EF, it’s getting difficult to FIND things made in USA! Cree emitters are though…
Is there a way to determine bin by looking at the emitter? On the ‘Comex’ copper star of the SST-90 I pulled from my generic/unbranded X6, there is 47.12 printed above “SST-90”. I didn’t realize that the SST-90 had a similar Vf to the XM-L/2. Seems to me that the SST-90 uses only 14% more wattage than the MT-G2 at their ‘safe’ upper limit. Reinstalling the SST in the X6 would also most likely better focus the light as the MT-G2 sits a mm or two too low in the reflector.
I knew Cree was, no idea where SST are made by Luminous though.
Luminus Devices maintains ISO certifications critical to quality management and manufacturing systems.
ISO 9001:2008, Luminus Devices, Inc.
Luminus Devices holds ISO 9001:2008 certification for its quality management system and manufacturing facilities located in Massachusetts
From the looks of their spreadsheet, the SST-90 in N bin makes between 850 and 1000 lumens at 3.15A. This is with a Vf of 3.25. Following their graphs, it would appear to make around 1500 lumens at 5A with a Vf or 3.48 or so. Not sure why it’s being said it’s not efficient, seems to me it tracks right along with the XM-L2 while maintaining a lower Vf. Should be easy to get up over 7A from a single cell. According to the graph, between 6 and 7A the Vf is 3.5-3.6 approx. Looks pretty doable to me! Guess that remains to be proven with the new FET drivers, which I aim to use.
Maybe this big chip tech has been waiting for some FET drivers?
Oh Richard? I need some MT-G2 Noctigons! 
Generally speaking higher vf and lower amps is more efficient. It might compare well with the XM-L2 but when you start pumping higher amps through the rest of the system the losses added up (resistance, heat not generated from the led).
Ah, yeah, so lumens output vs power consumed. Gotcha.
What’s the most efficient emitter currently available? For our use, I mean. Seems I saw something a while back about 200 lumens/watt???
7A should have a Vf around 3.6. I’m not planning on shoving any 10-15A through it. We don’t always have to poke holes in the ceiling you know! I wanted to use something other than Cree for a change, and Luminus is made in Massachusetts so it fits my American made theme quite nicely.
7A through an SST-90 should blow the doors off an XM-L2. Something to the tune of 3.6Vf and 1800+ lumens. Maybe not blowing the doors off, but besting it. Even if it’s only equal in terms of output, it will be doing it in cruise mode while the XM-L2 is panting and cursing. I want to see if that means it’ll be wasting less in terms of inefficiency.
Might not be the best thing to do, but I’m not doing it for that reason. Doing it because I can.