Fireflies ROT66 Flashlight

belt, suspenders, velcro, and elastic waist tabs? :blush:

Damn skv, you got a nice collection.

Newlumen, I see from your new avatar that you must really love your ROT66

ToyKeeper, I actually hardly even use my soda-can lights. I used them a few times for work but they are actually too big to carry around and I need to take pics with my other hand so I stick with smaller lights like TC20, C8F, Armytek headlamps, Acebeam H15, S2+ etc. I have used the soda can lights to ceiling bounce for indoor picture taking and took it out with friends to play around with. Otherwise I just enjoy collecting lights. It’s flashaholism at a feverish level. Hopefully I find good use for them some day.

My mistake. It was twisted raven who has the LH351D version.

Thanks for all the comparison info!

Actually I am getting my rot66 Samsung 5000k from skylumen54 Friday.

What is the difference with the skylumen rot66?

He just installed 9 samsung 5000k led and warranty. Thats it. Basically i am paying $100 to do the job.

You like the ss 5k better than the xpl-hi 5k?

I dont know yet… i am getting it tomorrow… samsung 5000k is 80 cri, and 6000 lumen… i will test output and beamshot tomorrow.

Anyone with a rot66 with the xpl hi ?? Can you guys post lumen specs ?

Compared to my other lights, it seems to be about 7000 lumens or so. Would be nice to know how close my guess is if someone can measure it accurately.

Yea you are right… i check out skylumen website and xpl hi say 7000 lumen…

So xpl hi and sst20 cw are putting out same output… i know xpl hi doesnt heat as quick as sst20… i like to know what are the advantages of xpl hi led in the rot66 ??

That would mean FF lumen specs are a little generous! $30 more for the xpl hi vs sst20. Maybe it's a brand thing and possibly not much difference except the price.

The advantages of using an XPL HI are higher output if the cells can put out enough power for these high VF LEDs. It may also have better tint on the CW model since it does not have a dome.

Otherwise, the SST20s are about as good as XPL HIs, as having a lower forward voltage than the XPL HIs, they can pull the same amount of power from fewer cells, resulting in even brightness with the XPL HI.

I have the impression they measured turn-on output with something like with very high drain Samsung 20S cells, having even lower resistance than Samsung 30Qs and VTC6s, and even VTC5A and VTC5D.

If it had 4 cells, I think it could probably achieve 10k lumens even from 30Qs.

TLDR: Fireflies was way too generous with the output of the light with XPL HIs.

Nice tech info thanks BSM.

Thanks BSM.

Yep, makes sense. :slight_smile:

The Samsung 20S seems to be known as the hardest hitting 18650 in the vaping community. 6-7 milli ohms or something? (if we are talking in a relative sense to VTC5A/5D ~ 9 milli ohms).

BTW do you know of any source for VTC6A?

I just compared it on the battery comparator, when this is newly charged and used in pocket rockets esp @ > 15A per cell for measurement purposes, wow. And the temperature increase @ 30A is really superb.

Got my ROT66 with the SST-20 4000k hi cri plus the 804 filter from Vinh in today.

So now I have:

ROT66 219B R9080 4500k
ROT66 LH351D +Lee 804 4000k
ROT66 SST-20 HI CRI 4000k
ROT 66 SST-20 HI CRI + Lee 804 4000k

LH351D 4000k and SST-20 4000k (both high CRI) need a minus green filter to get rid of their greenish cast (until someone can source some that place at or below BBL). With both using the Lee Zircon 804 filter, it’s very close between the LH351D and SST-20 when shining on white walls etc. When shining on wood and flesh tones, the SST-20 holds a clear advantage. Nothing else I have comes close to looking as beautiful as the SST-20 + 804 filter with regards to wood and flesh tones. I also prefer the defined, smaller hotspot of the SST-20 in the ROT66 compared to the wall of light that is the LH351D.

Compared to the tint-snob champ, the 219B R9080 4500k, the SST-20+Lee 804 will still look a little dingy and unpure on a white wall, but I prefer the SST-20 +804 still with wood and flesh tones. Output on turbo is greater than the 219B R9080 as well, although nothing gets as impossibly low on moonlight as this 219B sample that I have :P. Anyways, I think both tints are equally as good, and you will probably prefer one over the other depending on your mood.

Also one more thing to note, with the new Anduril UI (and I’m assuming the ramp ceiling being the highest regulated output), the SST20 HI CRI has a higher regulated output compared to the 219B R9080. I’m guessing around 1400 lumens. 5 mins in and the light is only a little warm.

Good summary.

One thing I guess I will never understand is how people hold 219B to such high acclaim. Saying SST-20 + 804 is still dingy and unpure but is probably still closer to BBL than 219B will ever be. So much stats and measuring involved and ultimately everyone ends up just choosing a preference based on a pink hue that is more visibly appealing even if less technically accurate.

Similar thing happened when the SST-40 became popular to use for modding. People claimed even though it was such a high CCT that it still looked “pure white”. It’s got the most hideous blue and purple spill I have ever seen.

I guess ultimately I am thankful that, to me, what people typically consider unbearable green hue does not stand out very much to me. I feel like if the 219B was any other brand than Nichia or ~80CRI everyone would hate it.