4 Cree Light !!

[J.D.]

What options are available if you wanted to drive the led's at a higher current? Would it possible to direct drive them as they are? Maybe with a small resistor?

You could use the shark board form the sandwich shoppe http://theledguy.chainreactionweb.com/product_info.php?products_id=1089.

Maybe the best solution, but a little expensiv...

Or you use a cheaper solution, as discussed here:
https://www.candlepowerforums.com/posts/2294633#post2294633

 

[-walle-]

You could use the shark board form the sandwich shoppe http://theledguy.chainreactionweb.com/product_info.php?products_id=1089.

Maybe the best solution, but a little expensiv...

Or you use a cheaper solution, as discussed here:
https://www.candlepowerforums.com/posts/2294633#post2294633

Thanks. But isn't the voltage off on the shark board? I would think you'd something like 14.8V to drive four cree's, or does it not matter as long as the current is high enough?

 

[J.D.]

The shark converter is a boost board.
It means with an input volage 8,4v the output voltage can be as high as 22V.
(As long as the input current didn´t exceed 4A).

The shark is current OR voltage regulated.
In this setup you would regulate the current, with the remora board in 3 steps up to ~1A for 4 Crees in a row.
So every Die gets exact the same current.

For more information about the shark board search for some threads her on cpf

 

[Bandgap]

What is the spread of this light?
- Beam width at a certain distance would be fine thanks.

And does any one know if it is wider or narrower than the MX Power 3-Cree.

and has anyone got a light meter near either of them yet?

Thanks

Steve

 

[mountainpenguin]

runs for 45 mins on 4 ultrafire 880mah rcr123.
Also It gets quite warm. It gets a lot warmere after i deed some heat transfer gloop between the board / cree block and the head.

 

[fa__]

It's strange : mine has run 55 minutes on 2*18650 and each battery still shows 3.8V (4.17 initially)

But it really has not enough light power, if i can unscrew the head i'll fit better drivers (and enhance heatsinking if required). I would say mine is about 300 real lumens , a little more than my fenix T1 but not so much

 

[fa__]

runs for 45 mins on 4 ultrafire 880mah rcr123.
Also It gets quite warm. It gets a lot warmere after i deed some heat transfer gloop between the board / cree block and the head.

I ask again because i really would like to open mine : how did you unscrew the head ? heat ?

 

[ledebuhr1]

So it sounds like its not really much brighter than the 3-cree MX Power. It would be nice if someone, like Fenix, would come out with a light that would push 1000 lumens for us flashlight nuts.

 

[fa__]

I hope wolf eye storm is as good as is it seems ... i'll end up buying one :naughty:

 

[johnnymceldoo]

I hope wolf eye storm is as good as is it seems ... i'll end up buying one :naughty:

Mine showed up! Its a sweet light. Dont have my tiablo for comparison shots right now though just a task force and single CR123 ultrafire.

It would be nice to see some caparison shots of the storm vs. quad cree.

 

[mountainpenguin]

the head just unscrews. It wasnt glued or anything

 

[fa__]

You were lucky, or i was unlucky, because mine still refuses to open ! I'll try again

 

[fa__]

Still unable to unscrew !
I let the head 6 hours at -18°C , didn't help
I let the head 30 minutes in boiling water, didn't help
Don't know what to do next :mecry:

 

[rizky_p]

Still unable to unscrew !
I let the head 6 hours at -18°C , didn't help
I let the head 30 minutes in boiling water, didn't help
Don't know what to do next :mecry:

must have been a really tough glue.

well i finally convinced my friend to buy one cant wait it to arrive. this is going to be my first romisent light. i hope it is a good one.

 

[W-c.Scenario]

Still unable to unscrew !
I let the head 6 hours at -18°C , didn't help
I let the head 30 minutes in boiling water, didn't help
Don't know what to do next :mecry:

Heres a tutorial on how to open a Fenix head, you need strap wrenches though https://www.candlepowerforums.com/threads/169949

Im very satisfied with this torch so far.
I currently run it with 18650 batteries, have anyone tested "4 x 3,7v RCR123a protected batteries"?, if so, did you have to shorten the tailcap-spring?

 

[fa__]

Thanks for the tip, i'll try to find strap wrench ...
Concerning RCR123A, mine is ok without modification with 4 AW RCR123 protected

 

[W-c.Scenario]

Thanks, nice to know, I´ll order some AW´s :thumbsup:.

 

[xevious]

So it sounds like its not really much brighter than the 3-cree MX Power. It would be nice if someone, like Fenix, would come out with a light that would push 1000 lumens for us flashlight nuts.

It would be interesting to see the beam comparisons side-by-side. CPF member reported 300 lumens is just a guess... ~50% off 650 lumens spec seems severe. I'm hoping it's more like 400 lumens minimum.

If you want 1000 lumens or higher, you might as well start looking at HID.

 

[W-c.Scenario]

Measured on mine (received yesterday)
On high mode:
970 mA with 2* 18650 at 8.05V -> 7.8W
520 mA with 4* rcr123a at 16.49 v -> 8.57W

Characteristics Q4: (info from ledsupply.com)
DC Forward Voltage @350mA V 3.3
DC Forward Voltage @700mA V 3.5
DC Forward Voltage @1000mA V 3.7
Lumen Rating @ 350mA lm 100
Lumen Rating @ 700mA lm 170
Lumen Rating @ 1000mA lm 220

If each led is driven @ 520mA with AW´s 3,7v rcr123, cant we then assume
that each led produces around 140 lumens?, so 560 lumens?

 

[ledebuhr1]

If you used 4 Q5's and got 200-250 lm per led, you would be there.