I think maybe by comparison here it looks a little green, and maybe it does in general, but in usage it looks, well.. honestly it looks almost "perfect" (Perfect as in "pure white light" my actual perfect look is that one xhp35 4000k i have in the K1 shot, but thats because its warm and rosy lol).
I dont have a single LED light with sst20 4000k, but i will throw up a multiemitter in the shot :)
Sorry, I EDITED the photo, i felt overly compelled to add the notation to the top of the photo, for those who may not read my long-winded explanation in the text below
OK, so im only adding this because i have more of a question about why this happens while taking pictures of beams. Well and because Morelumens asked for a picture with a sst20 in it lol.
So in the following picture, the FireFlies e07x has a sst20 4000k in it, and IN THE PICTURE that sst20 looks VERY rosy. It LOOKS like the rosiest by far. It Is Not! It is actually, by far, the most yellow of the 4 lights in the picture!
But, every time i try to take pictures of beams (like this, and i have tried often to show off why i like my very Rosy xpl-hi 4000k 5D) the damn sst20 4000k in the picture looks like the rosiest, even though its the most YELLOW.
Why does this happen? Why does the most yellow in real life look the most rosy in the picture, and the exact opposite also happens - the most rosy in real life looks the most yellow in the picture!? It honestly makes me hate the sst20 4000k even more lol. its being a picture imposter!
Any help anyone can give me for taking these pictures would be great. im using an Iphone 12, but i downloaded a picture app by the suggestion of another user so i could manually adjust white balance and stuff, but i am having a hard time figuring out how to set the app correctly, obviously! lol.
Here is the picture, and take from it what you will. BUT JUST KNOW - in real life, this is how they look:
sft40 = perfect white light, not blue, green, or anything
sst40 = a nice slight rosyness, very nice actually
sst20 4000k = yellow, boardering green, but not really green, just YELLOW.
xpl-hi 4000k 5D = the most rosy LED i have, its the "older 5D", before they became yellow from intl-outdoor
And i know its not my eyes 
my job partly consists of me selecting and matching color, and before this i managed and ran a paint store for 10 years+ and i matched color and stain (stain is much harder than matching paint, because it can only be done by eye, not with the computer like paint can be now) and i was recognized by co-workers & customers for being "more than decent" at it. so my eyes, they are OK. for now. Although we all aint gettin' any younger 
I think it's a Bin thing (I particularly remember a thread by LuxPerpetua mentioning two different bins of sst40). Because even in "real Life" (not behind the delusive camera lense) the sst40 i got in this M21a from Simon, it looks rosy and "warmer" and nice. I have had sst40 5000k's looks just "natural white" too though, and not be rosy and warm.
Thanks for the SFT40 beamshots, the more i see of this LED the more i like it.
As for your rosiness issue, i can only guess that there is an issue with color reproduction in the camera in that the camera is reducing the specific band of colour that would ordinarily mask the rose in the SST20, and that there is enough difference in the colours produced by the SST20 and XP-L HI for the XP-L to not be affected as much.
It would have to quite a specific and unusual set of circumstances for this to happen though which makes me think this is not the right explanation but i can’t perceive another one at the moment.
Have you got another camera you can try? Or does this happen with multiple cameras?
EDIT - Another thought, the hotspots are irrelevant here because they are blown out so the rosiness is reversed in the spill only. Is the XP-Ls spill that you can see in the picture rosier in RL than the SST20s spill?
Unfortunately i do not, just an ipad, which i will try, but that camera is shyit!
I should've been more clear - i am only talking about the spill
Yes, in RL the xpl-hi's spill is MUCH ROSIER than the sst20. in RL the xpl-hi's spill is NOT yellow at all, and the sst20's spill is NOT rosy at all. pretty much, they look the EXACT OPPOSITE in RL versus this picture.
Another thing i find interesting - the SST40 that looked rosy and warm in the picture a few posts back (Specifically see Post #9), looks yellow and not rosy in this post (#17)
*I only capitalize to illustrate the emphasis of the words, i'm not angry. well I'm not angry at you, just my picture taking abilities 
SST20 4000K (FA4) in my E07X is not yellow. Its rosy compared to SST20 4000K (FA3) HL3A. That is how my eyes are seeing. And all my lights are 2700K to 4000K.
I’ve experienced the same phenomenon with inverted pink-green shift in the past. Very weird indeed.
One tip though when posting shopping links… only copy the URL up until the ‘.html’. Everything after that is tracking BS
huh, i definitely did not know that, thank you!
No, you are correct. I wasn't clear about what i meant. everything is relative, and in my experiences with trying many different emitters and tints is I (me personally) often cannot see the "hues" (red, green) as well without comparing a LED to another for reference.
What i meant to say is, when comparing any of my sst20 4000k or 2700k to my xpl-hi 4000k or 2850k they look yellow. not green, i didn't mean to say green earlier if i did. the sst20 4000k i have are from FireFlies only and they are very good bin (FA4) and not green or overly yellow. But when compared to an xpl-hi of the same cct, they are yellow where the xpl-hi is rosy-er. although the most recent xpl-hi 4000k 5D available from Hank (an emitter that has been known for being beautiful and rosy/pink) are much less rosy and more yellow.
I put SFT-40 in BLF A6 and in WildTrail D80v2. I measured almost 27kcd throw in BLF A6 with SFT-40. 116kcd in D80v2.
“Details are in ”What did you mod today” thread”:What did you mod today?
g_damian - Thanks for sharing! that is awesome! and great results with the D80v2 and the A6, those are great numbers for those ligths especially at 2000 lumens!
A quick beamshot comparison I made tonight of 3 awesome lights. The main reason was because I recently modded the Astrolux ea01 with a sft40. It really increased the throw, I will get around to measuring the Lux with my mix meter eventually. Just wanted to share. The furthest trees are around 300 meters based on google map
EA01 sft40
X9l
dt8 w2
all of them
Really cool stuff Artie, your doing some good simple mods. I near at the point to do reflows. Thought I had everything then discovered I need solder paste as well as solder wire! But my flashlight tool kit is growing by the day.
So awesome to hear! I am glad you are getting there! And once you buy all of this stufff you know exactly what you need and don't have to buy again for awhile so that's good!
I did my first kite complixate mod the other day. I changed 7 emitters in a FireFlies E07x pro. It was my first go round with something with a auxiliary led board.
next up - I'm doing two driver swaps on older Emisars. I'll document them both. Cheers buddy!
Is the EA01 with xhp50.2 still a better looking beam?
hmm… better looking? maybe… but they ar ejust quite different. the EA01 with xhp50 (i remember raving about that beam back when it came out) is really nice and very useful because its so large. the beam on the SFT40 mod is MUCH further thrower than both sst40 and xhp50 of course, but i wouldn’t say nearly as useful as the xhp50 version. If i had to pick just one, it may be the xhp50, just because the light is useful for more things. the sft40 is just more fun i would say. It out throws my Noctigon KR1 W2 easily, and is brighter. I cannot say the same for the EA01 with sst40.
Thanks Artie. I remember you liking the earlier version.
I really did. And i'm actually pulling the SFT40 out of this EA01 to send over to another BLF'er so they can mod an awesome and WORTHY light with it! so i will most likely put the xhp50 back into the ea01, instead of the sst40 it came with. your comment reminded me of how much more i liked the EA01 with that LED. Plus, when the sst40 version arrived, i got slightly angry blue on turbo from it.. kindve disappointing from a stock light running a 9.6 amp battery.. ohwell, shouldn't happen with the larger xhp50. maybe ill finally try a dedome on it. i have a couple extra xhp50's so i can mess around a little bit with it. I remember TomE saying that dedoming the sst40 in the EA01 was not that impressive, so i wont try that..
I received the L21a SFT40 yesterday, and this light is Awesome. So far, the largest reflector i have used the sft40 in has been Simon's M21c (see first post), this light Really shows how awesome the SFT40 can be! Plus the light is just beautiful! I have comapred it to the K1 sbt90.2 and the Emisar D4S V2 with Osram W2 below.
