Only with damaged phosphor and only up to 9 Amps or so (I only had one sample and it was destroyed while testing)
I have not planned to buy new ones since I don’t need them.
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I have no way to measure, but I hate green tints and I think those 5000k look great.
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It’s all good, pleasing to the eye and so on. But up to 3000 K light is chosen either by enthusiasts or for work where it is really needed. in my case it is the second option.
I will look for an alternative with a more productive warm light.
It’s all personal preference. Light quality ranks pretty high for me. While the 3000K certainly looks nice, it is underwhelming in terms of output.
But I was replying to someone asking about the 5000K version. I don’t think I’ve seen an output test of that one, but if it’s closer to the 6500K then it could be a great alternative to it since the tint is IMO much better.
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at least for the emitters sold currently. If KD sells another color bin at some point this might be completely different…
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There’s a gen2 : http://kaidomain.com/SFT-40-Gen-2-29W-8A-2200-Lumens-SMD-5050-LED
No datasheet from Luminus yet as usual.
There is also no Information what the difference between 1st and 2nd Gen is. I assume this is only a slightly more efficient version, with no significant changes for crucial operating conditions.
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“Now with extra green”
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Do you have some more information on this apart from the linked example?
Unfortunately not, because I only had one sample of 5000 K SFT-40…
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I have dismantled the SFT-40 to get a new look on this widely used emitter.
It is noticeable that the frame seems to be quite elaborately manufactured, and it also appears to be very precisely soldered to the substrate.
This is remarkable considering the price, the number of units and the delicate dimensions of this metal frame. The well-known “egg yolk” round-die LEDs do not have this frame (presumably these LEDs are held in a kind of mold during casting and then removed from it), which should significantly reduce the manufacturing costs. In general for me the Luminus/Sanan LEDs are of very high quality and are very well designed.
For comparison the round-die chips of FFL505A and W5050SQ3:
The LED chip of the SFT-40 probably comes directly from Sanan, especially as it is not found in this particular form in any other LED, and Luminus also belongs 100 % to Sanan. The familiar round-die LED chip from W5050SQ3, “Yinding 5050” and the like has the same thick dots, and the design with the surrounding carrier for the bonding connections is also identical. The surface finish (silky matt gloss, no shimmering in rainbow colors) is also more or less identical.
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I noticed something similar when I dephosphored an LH351D, initially it had a shimmering rainbow effect but I was able to scrape it off and got a very angry blue, which worked fine until I got bored and put in a 519A
This definitely is evidence that LMP is almost definitely getting their dies from San’an, as well as the OEM for the FFL505A, this is fascinating, I wonder if the SFT25R also has the same die construction.