Fireflies ROT66 Flashlight

to you who ordered, did it indicate how long the shipping would take?

Also, do people really like ‘VERY ROSY’??? Doesn’t work for me, guess I prefer the cheap emitters :frowning:

this thread should grow……

Oh no, another Chinese company with the word “Fire” in it. :smiley:

The owner of Fireflies is the same as Enogear. The paypal payment went to the same person as the two Enogear purchases I made. For those that never heard of it, here’s a thread regarding the Enogear Stainless Steel AA/14500 flashlight that is well loved here. I bought one too but unfortunately mine along with a few others reported their Enogear AA/14500 got fried by using 14500. Jackie hopefully has my replacement in transit right now, which he promised me. Otherwise, the Enogear Stainless Steel was much better than expected for the price (nice rosy tint also).

If shipping is the same as Enogear, then it is slow like a turtle. Expect 1.5 to 2 months for it to arrive.

nice looking light, can’t wait until someone from BLF make a review of it

Some people do like that, yes. I have a couple of these emitters, and while I don’t want every flashlight to be that way, I enjoy it.

I’d like to see another high-CRI option for those who don’t enjoy that. The Samsung LH351D would be a good choice.

The driver design is from me, also was heavily involved to get NarsilM running on it, a lot of practical problems for fireflies to get it done in mass production
I did not even count the hours communicating over Skype explain things, troubleshoot ect.

There has been a lot of work getting it done, lots of problems like with a big loacal distributor for Microchips delivered fake ATTiny85s
To keep problems like this not happening again all parts for driver were ordered from Arrow in the USA

Final product looks promising

the best MOSFET I could find going through specs of different manufactories is used
the same Infineon MOSFET for best performane I use on all my drivers after the SIR404
BSC009NE2LS5IATMA1
Basically the MOSFET is like none existent even down to low battery voltages the resistance keeps extremly low, 1.2mOhms at 3.5V

Lower modes are current controlled with AMC7135s the good claw type

I tried everything I could do over Skype to get the flashing issue fixed, on a picture the markings on the Attiny made me suspicious,

to get the problem dealt quicker Fireflies sent me a prototype driver and LED board with DHL Express, flashing did not work so I cut it off and made makros of it,
definately does not look original

As I was sure an original Attiny85 worked great, so I build a few and send them back with Express for the first prototypes

Production

Some product pictures with first prototype

They went for SS Bezel and Tail even if the production costs are higher, pretty unique as far as I know
The center 2mm rod of the carrier got removed even if its in the design there, has no real practical advantage

So it’s current controlled for the lower modes with 7135 chips, meaning the 9 emitters are parallel? And do you know what the max current controlled output is for the 219B? Awesome you’re working on this project! :sunglasses:

Edit: Ugh, of course it’s 9 x parallel; it’s FET with 3 cells parallel. And max current controlled output is something like ~1500 lumens I think.

Knowing the driver was designed by Lexel, I’ll probably buy more later! Can’t wait to receive mine!

Any chance of a clear anodized version?

Nice work Lexel!!!

What are the specs of the NW led? Bin and tint

Now I gotta save money to buy this beauty :heart_eyes: :smiley:

So what is the difference between the 7050 aluminum on this light vs other lights?

this would be my choice as well. At first look at the original post I thought the one picture was of a clear anodized one!

Also given that usually a larger amount of lower driven LEDs are more efficient than one single highly driven LED, does anybody have any estimates on heat management or runtimes on constant current for the Nichias around 1000 lumen or 2000 lumen?

You point to CREE XPL hi nw? It is XPL Hi V2 3A

This made me do a calculation.
The Nichia’s are run at close to 700 led-lumen at max each to reach 5000 OTF lumen, and TA’s test of this very led shows that 700 lumen is right at the maximum that this led can put out. So if the 5000 lumen is real, this light seems to stress these leds to the max and they are not used very efficiently.

That would make 6000’ish lumen, is there really a 20% loss with the optics?

I e-mailed them yesterday, got this reply this morning:

Hello patrick

thanks for your email. and we will do a promotion in Budget Light Forum next week

Thanks
jack zhang

TA’s old calibration was measuring too high so you need to apply a correction factor of 0.70. Instead of 700 lumens, it will be 490 lumens.

I haven’t heard of any 219b flashlights making anywhere near 5,000 OTF lumens. So if this really does get 5,000 lumens with 9080 emitters like in the manufacturer’s test report, it is pretty darn incredible.