So for high CRI lights i have an FW3A in SST20 and one in Nichia 219c. I keep on reading the 219b sw45k is the holy grail. Been checking out the Reylight TI Pineapple. Is it worth upgrading? Or will I not notice the difference.
It is a very nice led with a great tint. I enjoy it more than 4000k SST-20 FA3. I love rosy tints personally. I think you would enjoy a triple or better configuration because a single 219B isn’t going to put out massive amounts of light. I do own a pineapple with a 219B sw45k and I don’t regret it one bit!
sw45k has a very rosy output. Some people love it and some dislike it. Only way to know which side you would fall on is to buy a light or mod it into a light. So I say go for it!
Make sure your FW3 peaks at 12A if using the 219B.
how does one do this?
Good question. Someone once built a custom Andúril for me to limit output (D4V2). I guess if one is able to swap emitters, he will have an idea about how not to kill the LEDs.
I was thinking of setting the high ceiling to a lower setting and not using turbo. A custom anduril would be good too will look into flashing fw3a.
Maybe using a lower discharge battery would be ok, too.
Well I pulled the trigger and purchased it. Thanks guys! 
I prefer rosy binned SST20s at 4000k with a Lee minus green filter over them to the SW45K. They’re throwier, more neutral, and I prefer the slightly warmer CCT.
However I think everybody should experience the famous SW45K at least once.
It’s not the holy grail, Sunlike (ECO SOL or seoul semi) is. Better cri, more turqoise, less blue bump.
But the 35/36v driver required seems to be a myth….
219b is better than most of what you’ll find in production, E21A 4500k is probably a bit more balanced than 219b, but I don’t have mine yet.
SST20 sucks because most bins end up slightly green, above BBL - and there is no high cri 4500k/5000k SST20.
The Reylight? Good decision.
SW40 > SW45K IMO.
Much more natural colours.
I find the sw45 too cool for me. Losing some of the benefit of the high CRI but also losing a ton of brightness over lower CRI and/or newer LEDs.
I love the sw45k, it is my grail, on the right:
the pink only shows up at certain times of day, at night the sw45k is a crisp bright white, without being too blue, and with no hint of green.
another exposure shows the violet aspect of sw45k, which helps it work well during the day, without being noticeably warm (yellow).
the sw40 is not of interest to me, its tint is greener than I like, and the color temperature warmer than I like.
Once I found sw45k I changed all my sw40 LEDs to sw45k instead
I like the sw30, but only when I am dark adapted. I dont use it during the day.
Beautiful Rosie Tint. Cannot wait to get mines in the mail.
Hope you love it as much as I do… give it time to experience a few different background lighting situations
a Ti ReyLight w sw45k is an AA cell, grail configuration, imo
another view… so hard to shoot the tints consistently…
here the pink comes through with more subtlety
here is my grail aaa, the Copper Tool w sw45k:
While every good collection should have one, it is not the holy grail. There are tons of other LEDs that outperform this LED for different tasks: There’s higher CRI LEDs out there, different CCT, more output etc.
It’s the holy grail for a lot of people because of its trademark rosy tint. For me it’s SST20 FD2+804. SW45K is a little too cool during the night.
Im of the opinion that the sw45k is hard to beat for color rendering, at modest ouput levels… it is not a super bright (nor super green) LED
the green lumens have been traded for red lumens… output goes down, by the same percent that red spectrum goes up
several LEDs have been mentioned as alternatives to sw45k
LH351d, which has higher output and larger hotspot, but the tint is greener and the R9 (Red) CRI is lower
the SST-20 has higher R9, but the tint is greener (an inexpensive way to experience this LED is to buy a Sofirn C01S)
xp-g3… nah
XPL… nah
E21a… greener, hard to source, not easy to get a good beam w existing reflectors
Optisolis… greener, like E21a, hard to source… and requires pebbled Tir to blend the tint shift across the beam…
I find most claims of LEDs to beat sw45k are brighter but their tint is greener, and or their R9 CRI is lower…
more lumens = greener lumens
I dont use sw45 for its max lumens, I use it for its max pink tint and High R9 CRI.
choices are good… I have the others too… but I keep coming back to the sw45k…
ymmv, thats just me