Crazy Idea Time... G3 + AN14 + 3x17500 ?

[RobertM]

I'm completely new to incandescents, but I dreamed this up last night

After recently purchasing my first "real" incan, my new SureFire G3, it got me thinking...

Could you attached the SureFire AN14 1.5xCR123 extension/adapter to a G3 and run a 12v lamp on 3x17500 cells?

If so, who makes a good 12v D26 lamp?

Anything I'm missing with this crazy idea?

 

[mdocod]

hmm....

I *think* the cell arrangement should work fine, problem is going to be finding a D26 lamp that doesn't blow. Most of the 12V lamps out there (by ultrafire/G&P/SpiderFire/SuperFire etc etc) will tolerate 3xRCR123s, but moving up to 17500s would probably blow them, and the "14V" models are generally optimized for 4xRCR123s.

Here's an option for something really bright:
http://www.candlepowerforums.com/vb/showthread.php?t=190833

get that bi-pin D-26 module, and try out that 22W axial filament bulb for use with 3xli-ion. Should be killer bright.

Eric

 

[matt0]

hmm....

I *think* the cell arrangement should work fine, problem is going to be finding a D26 lamp that doesn't blow. Most of the 12V lamps out there (by ultrafire/G&P/SpiderFire/SuperFire etc etc) will tolerate 3xRCR123s, but moving up to 17500s would probably blow them, and the "14V" models are generally optimized for 4xRCR123s.

Here's an option for something really bright:
http://www.candlepowerforums.com/vb/showthread.php?t=190833

get that bi-pin D-26 module, and try out that 22W axial filament bulb for use with 3xli-ion. Should be killer bright.

Eric

Maybe I'm overlooking something but how would something that accepts 3x RCR123's not accept 3x 17500?

 

[mdocod]

voltage sag under load....

Have to keep in mind that the "12V" tactical lamps are optimized for 4xCR123, so they are designed to run ~9.6-10V. (CR123s do not run at 3.0V under a load, so tactical lamps are optimized with the internal resistance characteristics of CR123s taken into account).

RCR123s, into the load of one of these lamps, will start off at ~3.8V give or take, or 11.4V total, which is definitely overdriving the ~10V lamp already. (some people have reported premature failure on this setup).

A 17500 has about double the capacity of an RCR123, with greater capacity within the same chemistry, the internal resistance of the cell is generally lower, which means, that compared into the same load, the larger cell will run at higher voltage.

3x17500 could push as high as 12V into the same load, enough to push the lamp over the edge.

Eric

 

[DUQ]

It's a good idea but you would need a 13v bulb but only Wolf Eyes and Lumens Factory make them. Only downside is that they do not fit into the G3. Try out one of those cheap 14v bulbs and see what happens.

 

[Chrontius]

Also, the Cabelas people make 2, 3, and 4 cell Surefire 6P clones - that means they have 4-cell d26 lamps, plus the Cheap *******'s Turbohead (about $30) - a lamp assembly somewhere between a Surefire D26 and turbohead; downside being nobody's found replacement lamps for them yet. Upside being if they'll take the Fivemega 22W axial bulb...