Something in between I guess… The inclusion is clear so there will not be a great deal of absorption taking place, I’m pretty sure you will be alright even when driving the leds to the max. But if my life depended on it….
Thanks. Then I’ll just struggle on 
Firing up the old soldering iron, and so on.
I experienced the same thing when buying from this seller. Each dome had some kind of imperfection on them. Mine were better looking than yours though. I think they are selling these off cheap because they are getting seconds from somewhere. I have found there to be no effect on the performance though.
So I sent my acebeam x60 for the upgrade to the modder…
Before:: XML2 dedome mod 6500 lumen / 550k lux
After upgrade. Sst40 dome on. 8000 lumen / 305k lux.
Do you guys think I made a good decision??
O dang… I recently ordered 2 of them from Shenzen Great Technology…
Bubbles… Really???
I guess you get what you pay for huh? 
Let’s just hope they’re as bright as the KD ones…
But, i was planning on dedoming them anyway, so that should take care of any bubbles. 
What’s “PDT”?
Pdt= Preminum dedome tint.
X60 was modded with xml2 dedome… then modded with sst40 dome on.
Okay, that explains the ‘more lumen, less lux’ numbers.
Except for one minor problemo: the lowest part of all the bubbles is below the highest point of the “curve” of the leads.
There is one LED with the bubble next to the phosphor. That one I will try to shave. One other is getting a gasoline bath.
And if all goes pear shaped: the one with the tiny bubble remains in virgo intacta.
I just looked at my emitters from the same Ali vendor. Almost every dome has bubbles. Here are some of them.
Yep. They are definitely selling seconds. When I messaged the seller they replied, “do not worry They are genuine sst-40.” So, I do think they are genuine. Very bright and very low vf! Good color as well. So, if dedoming or if you don’t mind the bubbles it’s a very good price for a very good emitter. We will have to wait for reports as to how they hold up over time though…
It would be interesting to get bin estimation….
Has anyone found a place to get these in a neutral tint yet?
I picked up a pair of these in 6500k from KD. Not sure why I did it, really hate anything below 5000k. Mounted one up and tested it, very bright but just can’t handle the tint. So, now they will sit for an eternity in my LED box. Maybe someday someone will ask for a mod with that tint… Would love to see these in 5000k - 4000k.
Why not just dedome them?
From what I have read, there is almost no tint shift. I may try one that way in a C8, just for giggles.
Dedome?
Doh!
I keep on doing that… 
I only have 1 in a M1 but i cant see any.
Just do it!
Got just shy of 160kcd in one of my C8s.