Fireflies ROT66, Born for fans of flashlight

I do not have a stock D4 left (I do have a pretty :sunglasses:
one with LuxeonV’s though :slight_smile: ), but I trust my ROT66 measurements to be correct within the 5% that I stated above.

Yep that must be it, only explanation. :innocent:

This gonna be good

Good lord man…. You don’t have a freak Rot66. You have a wildly inaccurate measuring device.

I took time redo calibration for my TA tube. Now, my 219B ROT66 with 30Q’s measures 4440 lumen at 0 second, 3910 lumen at 30 seconds.

My TA Tube, ceiling bounce and my Lightbox all have the ROT66 way ahead of my D4’s and D4S. Just visually outside you can tell too. I hope my youtube review gets it across.

I’m not going to your youtube despite the shameless plug but it’s not surprising that the more floody the light the more impressive and bright it looks.

You no longer have a TA tube. You have a box of your own making, calibrated as far as I can tell to some arbitrary factor to make you high lumen lights read what you “feel” is the right number

PLEASE, let’s not start over this thing again!

This is a thread about the FireFlies ROT66!

It has been nice to read the posts till here, even for a guy that doesn’t have money to buy this flashlight!… Let’s keep it that way!

Please, let’s keep the thread clean about the TA tube or KG lightbox or whatsoever!!! That issue is beyond contagious and exhausting for those that just want to read some things and see some beamshots…

Create a proper thread to discuss that, compare measurements, improve readings, whatever…

But please, let’s keep the other threads rolling about the issues they were made to present/discuss! In this case, the above mentioned flashlight…

Instead, give us some beam shot comparisons, tint comparison of the different leds, something the make us get :open_mouth: and :laughing: and even :heart_eyes: , instead of :weary: or :person_facepalming: and eventually :frowning:

Just saying folks…

^ I agree, and here’s a quick beamshot of my little square to get back on track :slight_smile: , trees are at 25 meters.

That is a WOW :open_mouth:
I believe the tree further away will be like 40-50 meters and still being quite illuminated !
This beam is one of the reasons why I like flooders over throwers!

Thanks for sharing djozz :+1:

They are not live yet, I’m trying to get the local sculpture park to let me have a wander around and capture some Patinas with the Rot66 Nichia on the Henry Moore pieces etc. It’s risky as the place is a hotbed for Cruising and Dogging.

I love the Nichia but I advise people to avoid buying the XP-L as a few are shipping with crushed LED’s inc my sample.

Very close to maukka specs… djozzz tube did pretty good too.

My tube is a very specially shaped tube, it is a spherical tube in a square box :slight_smile:

Djozz, did you calibrate yours with Maukka’s calibration lights? Btw, that’s a very creative lumen sphere.

Follow his link for the sphere builds. He built these way before Maukka was offering his lights, plus I don’t see his name on the order list.

Before maukka started offering his lights, this spring I had an exchange of a couple of lights with him to check his calibration against my djozz-lumen (the djozz-lumen I found two years ago already 9% high when at TLF-meet-up re-measuring a couple of lights that were measured before in the Led Lenser sphere in Germany).
The calibration difference between maukka and me was different for a neutral 5000K 70CRI Nitecore P12 (djozz-lumen 7% higher than maukka) and for a BLF348 with 4000K 90CRI 219B V1 (djozz-lumen 11% higher than maukka). I have not found yet where the spectrum difference comes from (could be a few causes).

For the ROT66 numbers I substracted 10% from the djozz-lumen to correct for a high CRI Nichia that is a bit higher Kelvin than the BLF348 that read 11% high.

Driving me mad now, it’s reading 4600 tonight with fully charged Sony VTC5A x 3 and VTC6 x 3, down 1100 lumens on a few days back, but if I click off then go back to turbo I keep gaining 50+ lumens or so each time, the hotter it gets the brighter it gets at turn-on.

4600 at 4.20v 25c
5200 at 4.10v 40c

It doesn’t increase Lumens as it’s running though, only at turn on. My other lights aren’t doing it. My XP-L has a busted LED and the 219b seems to have output issues.
I wonder if the springs are expanding with increased heat giving reduced resistance or something. Ever so slightly loosening the tailcap reduces lumen output too.

Oh yeah it sets shop alarms off from 50m away too!

(I filmed it)

I’m filming it against the Noctigon M43 219C 80CRI and the ROT66 makes the Noctigon look unbelievably green. The D4 219C 80CRI stands up ok though, whitish subjects look super accurate.

Just got up, cold UK morning the ROT66 returns 4280 lumens at 4.07v, just warming the old girl up to 4600!

Weird.