FF ROT 66 gen 2 Whats the update?

Even if Fireflies doesn’t offer them stock I’ll probably just get them modded into the host regardless.

I assume the Osram emitter Fireflies was talking about is the KW CSLPM1.TG?

ROT66 gen 2 is now in stock on FF’s website, and with Osram emitters as an option!

Oh boy. I may have to be in on this one with that piece of info!!!

Fireflies - is there a way to dim the aux LEDs, and/or turn them off?

When will the the special “interested” price be released? Now that it is available at ff . com ?

The Osram emitter premium is pricey, anyone know what the single emitter price parity is compared to something like the XPL Hi or 219Bs? Does the extra $30 make sense? I’m a newbie to the /Flashlights, but quickly becoming a hoarder.

I’ve got the Emisar DV and DVS, FF Eos7 (favorite), and Sofirn Sp33 v2 with 50.2 emitter.

I’m also assuming the Osram has much more candela compared to others, and that being the case, the 15° TIR optics will be an especially long thrower? Does this also mean the extra 45° TIR optic that’s included with the flashlight will enable a more floody+throwy Osram emitter when it is used?

Thanks in advance for any info on my questions.

I’m just waiting for the Ti/Cu/brass ROTT66 V2 :smiley: :+1:

Yes

1: AUX light has High / Low / Off , on low mode it is very dim , Off mode to turn it off. It’s all controlled by UI.

2: You can also dim the aux light by rotate the 3 trimmers .

Thanks for your question.

High bin emitter sometimes is double or triple the price than lower bins . Regardless the high cost , it ’s not easy to get a stable supply.

ROT66G2 utilizes Osram 15W w2 high bin, which cause the configuration much higher price.

15 degree optics has better throw , the 45 degree optics included enable smooth floody beam.

Oh yeah, 219B with 15deg optic....

Can't wait for next update

Can the light still be mechanically locked out by unscrewing the tailcap?

No, not the new design. But, you can lock it out by unscrewing the head just a bit.

Just got my Gen 2 yesterday.

Hey Jacky, is there a different thread that is the primary discussion for the ROT66 Gen 2 elsewhere? I can’t seem to find it. Got some questions. Thanks!

Can anyone who has the comparison between rot66 g2 to astrolux mf01s or mf01 mini?

Why did the original Banggood listing, and Firefies’ site, state 18,000 lumens for the Osram version? But now shows 10,000 lumens instead? Has Jacky rerated the light down from its original claims? It’s definitely not 18,000. I would have been happy at 14,000 or 16,000. But only 10,000? I’m kinda disappointed.

Only 10,000... well, mine does 'only' about 8700 Lumens with XPLs.

Mode Measured Output
Fireflies ROT66 1 6,13 Lm
Sony VTC5A 2 30 Lm
with ND filter 3 81 Lm
4 218 Lm
5 435 Lm
6 858 Lm
7 1759 Lm
Turbo 8752 Lm

My full review can be seen here: https://1lumen.com/18650-reviews/fireflies-rot66-ii-gen2/

Fireflies eventually sent one to the third party lab for testing and he readjusted the spec afterwards.

Great test, I would like to know a few details please. I’m interested in the runtime test. Over 4000 lumens for a long time - it looks impressive, but I assume that cooling has been applied. Did you cool the flashlight with a fan during the runtime test, what was the air temperature? Did you measure the temperature of the flashlight during this test, is the data saved?
Thanks!

Wow noway this thing can maintain 8,000 lumens for 18 minutes. Also maintaining roughly 5000 lumens for over 2 hours seems impossible for the size and duration. Dont think 3 batteries can have that much energy or the driver can be that efficient. Even the X80GT with efficient driver and 18x XHP50.2 cannot do that. I would like to understand whats going on with that graph.

Even more questions arise when comparing these two graphs.


Why such a huge difference. It may be worthwhile to conduct testing under the same conditions and with the same settings for thermal monitoring, then these graphs will have practical meaning.

No way the ROT66 gen 2 can hold 4000 lumens continuous. Even the larger sodacans sporting highly efficient XHP70.2 emitters can barely sustain 4000 lumens without heat problems. I’m guessing the XPLs can stay at around 2500 lumens without too much heat.