This is a very impressive datasheet. The typical maximum output would be over 3000lm, from a 3.87mm^2 round die (actually 4.2mm^2–the datasheet is in error, see correction below). At 8A (the specified maximum of SFT40), datasheet-typical output is up from ~2100lm to ~2700lm, both due to increased efficacy at the low binning current of 1.5A, and better power handling, i.e., slower leveling out of the output/current curve.
This test already shows the SFT40 reaching 3000lm at 11A. (The tested sample seems to overperform the typical datasheet sample, with 2500lm @8A.) It would not be surprising, then, if a well-binned sample of the SFT42R tests over 4000lm at 11A, with surface intensity exceeding 1000lm/mm^2.
Strange that Luminus is reluctant to publish the datasheet, yet the emitter has been floating around for a while on KD.
That happen with SFT-90 as well, bought it from KD even before any datasheet was released.
But I would love if the best flux bin of SFT-42R do over 4000lm @11A, would be such a nice pairing with Convoy 10A buck drivers.
Not Luminus stuff, but I just ordered some N5-145HP from Nightwatch since it looked very interesting, although it only does around 3400lm @16A according to them, still… I wonder who made this emitter if it just a rebrand or custom, haven’t seen any with that weird bond wires. Will have to test it against SFT-42R when I can get my hands on them
This emitter looks a lot like the SFT42R! The typical SFT 5050 frame, but with a weird square thing around the round die. Would not be surprised if it is some sort of prototype. The fact that this thing can handle 16A could be very good news for the SFT42R…
Many of Luminus’s preliminary products have been circulating in the market for a while before being announced, including but not limited to SFT-25R and SFT-90X. Sometimes KD gets it earlier, sometimes later.
Afaik it’s “custom”, not sure which OEM it’s, it’s their secret.
I don’t think so, LED manufacturing and customization isn’t rocket science, LEDs that look similar may have little to do with each other. New high-efficiency LEDs will depend mainly on whether SanAn manufactures and sells these chips, Luminus as their brand, may released their version relatively late.
According to the unpublished datasheet, the new SFT-70X-WGH will have these CCT and CRI options, but no 4500K. From what I’ve observed, some Chinese and Russian sellers already have the 3000K ones, but the much-anticipated 4000K still hasn’t appeared.
Now that makes a lot more sense! I’ve always thought that the SFT42 had a slightly larger die from side-to-side image comparisons. This also explains the better power handling.
I think the SFT-25R-WG is going to be available in retail soon, but considering the G suffix likely stands for R9050 and only has 5700K option, it feels a bit like half-measure to me.
These emitters look like they may have potential, having a larger die than the previous SST20. Kaidomain says the warm version is 90CRI though instead of 95, which is a bummer. A proper 95CRI version could dethrone the 519A in CRI.
I’m a huge fan of Luminus’s 95CRI lineup because they address the issue of cyan dip in addition to R9, while Nichia’s R9080 emitters only addresses the latter.
This is the part that I don’t understand: previously, they only had 70CRI and 95CRI variants. The addition of 80-90CRI versions simply introduces confusion–there’s little point to use the 90CRI version when the 95CRI is available. I anticipate lots of mix-up and mis-specified CRI ratings going forward among the distributors.
That said, if some distributor gets their hands on 4000K 95CRI, I would be very interested.
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