I did end up reaching out to Simon who said my order was for the 6500k. I’m about 95% sure I ordered the 5000k but oh well. Oddly enough my order confirmation email doesn’t list a CCT for the SFT-25 while the other emitters I ordered do have the CCT listed. Simon did tell me that the bin he stocks for the 5000k is DD and the bin for the 6500k is BA.
In the end I guess the takeaway is don’t use my data for info on the 5000k version.
Yeah, I figured yours was an outlier when I got my 5000k SFT-25R S6 from Simon and it was nothing like the one you received, I highly recommend the 5000k though, Simon has a really good bin on it, and if I’m reading the datasheet correctly there isn’t a reduction in brightness between the 6500k and 5000k within the same flux bin.
You should be able to see order details in your account on the Convoy’s site.
No CCT listed there either, only the MCPCB size. Strange.
Glad to hear the 5000k is good, time to start putting together another order I guess. I’m still impressed with the emitter overall despite the very blue CCT.
Interesting…I bought a 5000K version from Simon and it goes very blue at 100% on the 8.0A driver; like it’s normal for a fraction of a second and then suddenly turns blue. Color is very similar to your photo.
It doesn’t do that on lower modes; in my experience that indicates over driving.
I don’t think heatsink or reflow were factors, since I had it in a Convoy L21b with good thermal grease.
So, I moved it to a Convoy M1 18350 host with a 5.0A driver and it behaves more normally; good pocket thrower.
This is a very interesting observation–I wish there were a test of the 5000K.
I agree that it is indication that 8A overdrives the 5000K SFT25R. I suspect that higher CCT variants are also overdriven at this current, but perhaps nobody notices it due to the same amount of CCT shift being less noticeable (shorter Euclidean distance on the CIE1931 diagram) on the upper end of CCT.
So I just got an sft25 6500k in an S6 with 8A driver and it has some egg yolk in the hotspot.
Next time I’m doing some mods I may switch it with some of the first batch of sft25’s I got from Simon when he first offered them. They were better.
My S6 SFT-25R 5000K 5A also has significant tint shift in the hotspot.
