Just ordered another one. sst20 version. Are they ready to ship?
Since they asked you about the LEDs, do you have any idea what tint bin SST-20 4000k they are using? Is it the same FB4 from Kaidomain? But if that’s the case, it would be green and not below the BBL as shown in their test report.
2 possible ways
- drill out the optics holes a bit
- use a thin washer to move the optics further away from MCPCB so it does not touch the dome
It was some time ago, when the SST-20 W was not not available and tested yet. I suggested the high CRI LH351D or LH351C, they checked the D but finally went for the N.219Bsw45r9080 because they did not like the LH351D. But I had no recent contact.
I guess they couldn’t find a Samsung without the greenish/yellowish tint. I’m just surprised they were able to find so many 219B 9080 sw45, that is supposedly discontinued. Also really curious which tint bin they selected for the SST-20W. I might buy another one if it is a good tint bin.
I suggested Fireflies a tint bin below the bbl, hope they can source it
Very good suggestion
The 219B version has 7x7135. The emitters seem to have sort of a slow activation time though, so the ramp stalls around the 1x7135 level. I tried to work around this by starting the middle portion of the ramp at a higher PWM level, but even at 15/255 it still stalls a little.
I think the SST20 versions have 14x7135, but I’m not sure yet. I’m also not sure how fast they activate, or if they can use a normal 1/255 floor for the middle channel. I haven’t tried that family of emitters before. So getting the ramp shape right might take some experimentation.
This light is pretty sensitive to bumps! Give it a tap on the tail cap and its off.
Its lacking a buffer cap, as I proposed for the Q8 a while ago:
How hard do you have to hit it? I just tried it. Slammed it hard against my hand and it didn’t go off. (about 10 times)
I’ve found it’s hard to tell when this tail cap is tightened sufficiently. Have had what you’re describing happen before and a bit more tightening took care of it.
Mine did that one night as well, where it would turn off or blink twice from slight bumps to the tail. I thought to myself “gee, when I first got this light I was amazed at how unaffected it was to bumps.” The solution is to just tighten the tailcap more.
OMG!
Have the hardware designers learned nothing ? It is not as if they haven’t been told, repeatedly, by me, and Flashy Mike. And the fix is so easy.
This really is inexcusable.
I could rant on, but they just don’t listen. They just regurgitate the same old sad designs, no innovation, no progress.
I despair.
So I just hit the very tightened tailcap of my light and the problem is still there. 
Maybe Fireflies should be notified about how to fix it.
I don’t think they consider it a problem. In fact most flashlights do this. Part of the reason the ROT66 does this is it because it doesn’t have springs on both ends of the battery carrier. A longer battery, like a protected cell, will put more tension on the springs and make it less likely to be bumped and lose contact.
As far as modding the driver by adding a capacitor you would need to speak to Lexel about that.
Wasn’t that in reference to the xpl-hi being crushed? That has now been sorted.
I don't know, was it?
Well, Vinh has put this quote on his advertisement for his modified ROT66 on his website.
https://skylumen.com/collections/v54-lights/products/fireflies-r0t66vn
He also sells the ROT66 with Samsung LH351D.
I‘m quite surprised that Vinh has the guts to put such a statement on his advertisement for his modified ROT66vn. If I was Jacky from Fireflies I would not be amused at all to read “Poorly assembled from factory (Email 4 info)“ publicly, especially if there’s an official/unofficial business relationship between Vinh and Fireflies. For what it’s worth, there‘s nothing worse one could do to harm the reputation.
I ordered the SST20 6500K / 4000K with AUX Lantern, which is expected to arrive before next Wednesday. 