If not already mentioned different copies have different length battery tubes. I have two 2019 versions. One is is clearly longer than the other. The longer one closes all the way and the shorter one has the big gap.
Does the shorter one has strobe and SOS?
> I have two 2019 versions. One is is clearly longer than the other.
that is new info to me
mystery solved
is there a difference in markings to recognize which one is the long model?
hoping someone will do a photo lineup comparing the different variations
Best I can do but the different markings are noticeable. That’s if this picture actually posts!
Crap that didn’t work. Anyone can feel free to post up here. I think all I put up was a link…
No difference in markings on my samples - and a bit less than 3mm difference in length
Engraving looks different.
Engraving looks different.
Not really
The ones that say jetbeamworld.com must be older as it’s not a jetbeam site now. I wonder why they made it longer. Could it be to accommodate protected 18350?
thanks!
a protected 18350 is 4mm longer than unprotected
if the lights were standing on their tails, vertical side by side on a table, the height difference would be more obvious, but I can already see that the difference is revealed by the pocket clip screws… they are in the middle of the tail lug, on the short one and not centered on the long one:
so the threaded portion is unchanged, but the tail end is longer
could you take a photo of the Four Versions of RRT-01, tailstanding side by side? 
Sorry about the cat hair, he was sure that I set these up for him to knock down… repeatedly 
thanks for the 4 model photo…
my cat also likes to investigate when I take pics… LOL
your 2012 shares the strobe capable driver with the newer models. (based on no RRT in the serial number itself). These do not fit protected 18350, the light wont close. (I use unprotected IMR 18350, with due diligence)
the short 2019 fits protected 18350, but has a cosmetic gap (does not affect water proofing)
the long 2019 fits protected 18350 with no cosmetic gap
the 2020 fits protected 18350 also with no cosmetic gap
Someone had to do it, and post at least... pardon my lack of ability to make consistent wb or format a post cleanly, but you'll get the idea.
219b sw45k 2020 rrt01 on the left
Vs 319c ~80cri 5000k triple in a convoy
Vs emisar d1 xpl-hi 4000k (forgot the rest of the numbers/ letters that go with that)
Initial impression, excellent of course! Went from unusable xpl hi 6500 something or another with horrible tint, but admittedly bright. I have harbor freight lights at work that feel ultra high cri compared to it, should've taken some documenting photos for posterity. Went from that neat unusable light to the top of the class. Anyone want to trade a stock jetbeam xpl-hi for emitter swap? Is there a thread for intentionally bad mods? trashy mods? Donated donor host/ drivers welcome :p. I'll try the yang with the ying. Wait, isn't that called a tactical light?
Last thoughts, would still like a more robust spill and softer boundary to spot. Without sacrificing output yada yada, that might be a pipe dream. Custom reflector? How to do?
Early on, during the extended Corona shipping time (actually, Neal got it to me pretty fast), i had really wanted the extenders for longer batts... but faced with reality, they make for funny proportions, and i dont have the button tops to use them with. Unless i poach out of those harbor freight lights from work... but that wouldn't result in desired run time lengthening, might go the other way actually.
Control ring on mine is dry and pretty loose action . Need to experiment with grease injection into that alleged grease hole before i go Jonathan on the ring assembly with my non wimpy thread lock breaking tools...i think i see some wispy grease traces through said hole. Lemme ask jetbeam snd i get to choose my answer!
;)
Do my pics show finally? I hear you other newbs. I might've learned me something (that was harder than the soldering and all that stuff). Image hosting whathuh?
I might've made all my inappropriate pics public tho in the process. "I gotta small gritty tool." "Here's one of my clicky...i think i like twisties." Etc etc... It's all too enticing for the imugr weirdos. These flashlight titles too titillating!
Someone told me how to lose the riffraff...it didn't take...haha... so far still entertaining and novel though. Someone said 2 minutes after i uploaded it that my tool was so small snd cute...5 seconds later another said "at least it's hard" (ya, because it's a tool ti! so obvious, duh! )
:FACEPALM:
This is what quarantine does to us.
So does the spill have rings in it or is it well focused using 219b?
Right, gotta do something other than climb walls.
No rings im noticing, unless you counted way at the bezel edge, i suppose off the ss ring. And when i first assembled without the centering ring. That was like a tie dye shirt x bullseye …
Right, I dont count bezel artifacts. Here’s a 2019 RRT01 w/ 219B I modded. Ignore white balance it was set to auto and looks like it changed in the bottom picture.
Yay! congratulations
your beam quality on the left looks excellent, almost no shadow ring in the spill. Much better than the beam on the right…
useful photo for comparisons
can you post the beam with the stock LED also?
I wonder what is different about the light Jchang76 modded, to produce what appears to be less of a shadow ring in the spill…
or are they the same and the brightness was just set differently for the photo?
Dang it, i wrote a reply and lost it.
Will check with you later after i photo the light by itself at night.
What is changed between the three shots?
Mine do look less ringy but we'll compare.
I think the marketing strategy in addition to lumens driven, is throw driven. They don't care about the quality of light (well, throw pwr does have its place) but the numbers that can be written down.
My smooth reflectors (3+) seem to share this effect. The "worst" being the throwy d1 with a cree. So add tint shift to that, which this has little to none.
Jc
Does the Nichia die lie deeper than the XP-L die? I have a non-perfect beam with the D25A (XP-L HD to 219B) and wonder what I can do. Same in a BLF A6 where thinning the gasket and finally slicing the LED didn’t work out (eventually I replaced the reflector by a honeycomb optics to save the light and now using it as fill light). TIR optics would be ok for the Eagtac also if I can find one, but it would be great to keep the OPR. Sorry for OT, but I hope it fits in this discussion.