Possible crazy small, crazy bright light!

[Juggernaut]

I don’t know about you guys but this little AW IMR16340 LiMN http://www.lighthound.com/AW-IMR16340-550-mAh-IMR-CR123-size-LiMN-lithium-rechargeable-battery_p_0-2626.html battery could defiantly make some pretty small / bright Incan lights. I mean you can pull 4+ amps out of this thing:faint:! Does anyone know any good T-1.5 bulbs for 3.7 volts? I can’t find anything higher then 8 watts while you could go as high as 16.28 watts:caution:! That would be like a 450-500 lumen bulb for the FM-D26 Bi-Pin socket/Reflector assembly:eek::devil:! I want that kind of power in this size of a package:twothumbs.

 

[StarHalo]

That would be like a 450-500 lumen bulb for the FM-D26 Bi-Pin socket/Reflector assembly

Try 630 lumens, seek and ye shall find.. :D

 

[Juggernaut]

Try 630 lumens, seek and ye shall find.. :D

630 lumens:eek:! How did you get that number:thinking:? I thought that was how many lumens the 21 and 22 watt bulbs for the FM-D26 Bi-Pin socket/Reflector made? You could only use two of these batteries for those:thumbsup: but I was looking for only a one cell bulb:faint:.

 

[jabe1]

If you like a light with a 3 minute runtime!

 

[StarHalo]

You could only use two of these batteries for those:thumbsup: but I was looking for only a one cell bulb:faint:.

Ah, gotcha. That's a good question, you'd definitely need a whole new kind of bulb for that..

 

[Juggernaut]

If you like a light with a 3 minute runtime!

It’s not 3 minuets it’s….. 7 and a half:drool::ohgeez:. Well that’s good enough for me:naughty:! I could honestly justify a light this big, that bright, which would only run that long. Hay it only takes 5 seconds to impress someone or replace the battery:nana:.

 

[mdocod]

Hi Juggernaut,

Designs that involve very low voltage and very high current are radically sensitive to resistance in the circuit, cell resistance, and minor variances in manufacture process of the bulb itself. There are numerous reasons we don't see 3.7V 4.5A bulbs, but most importantly, it would just be very difficult to operate such a bulb with any consistency from one application to the next, it would almost require voltage or current regulation to makeup for variations in external resistance.

Also, low voltage, high current filament designs, are less efficient due to lower surface area as compared with higher voltage bulbs. Kind of gets to a point of no return, where you're expending a lot of energy as heat, with a low bulb life, without much light coming out per watt going in.

I think it would probably be worth taking a 15% hit on efficiency with a boost regulator to drive a ~6V bulb instead.

 

[davidt]

How about a p91 in a 6p running off 2 AW IMR16340? Seems like the easiest way to get a crazy bright light in a small package.

 

[mdocod]

How about a p91 in a 6p running off 2 AW IMR16340? Seems like the easiest way to get a crazy bright light in a small package.

Yes, this is one of the brighter options in that package, I have mentioned it in at least a half a dozen places on the forum :)

Even brighter: A FM 1794 bi-pin.

LF is also coming out with a higher output bulb for IMR cells in D26 format, IIRC it's rated 500 bulb lumen, so right in the ballpark of the 1794/P91 arena of output.

Eric

 

[Stage Tech]

In my test , the EO-9 is Brighter than the P91 VISIBLY with 2x IMR 16340...

 

[oronocova]

Am I understanding this thread correctly... the FM1794 bulb + Bi-pinsocket assy + 2xAW-LiMN batteries will work fine? Should work fine? I ask because i have said assembly on order and this would tide me over till I can get a 2x18650 body for my 6p. Runtime would be short for sure, but fun never-the-less.

(:

 

[mdocod]

In my test , the EO-9 is Brighter than the P91 VISIBLY with 2x IMR 16340...

In my test, the P91 is brighter :)

 

[mdocod]

Am I understanding this thread correctly... the FM1794 bulb + Bi-pinsocket assy + 2xAW-LiMN batteries will work fine? Should work fine? I ask because i have said assembly on order and this would tide me over till I can get a 2x18650 body for my 6p. Runtime would be short for sure, but fun never-the-less.

(:

Yes, it will work fine. Short runtime yes.

 

[Juggernaut]

Hi Juggernaut,

Designs that involve very low voltage and very high current are radically sensitive to resistance in the circuit, cell resistance, and minor variances in manufacture process of the bulb itself. There are numerous reasons we don't see 3.7V 4.5A bulbs, but most importantly, it would just be very difficult to operate such a bulb with any consistency from one application to the next, it would almost require voltage or current regulation to makeup for variations in external resistance.

Also, low voltage, high current filament designs, are less efficient due to lower surface area as compared with higher voltage bulbs. Kind of gets to a point of no return, where you're expending a lot of energy as heat, with a low bulb life, without much light coming out per watt going in.

All right, thanks. but will the LF EO-4 at least work fine running off one of these cells? It only pulls 2.35 amps:rolleyes:.

500th. Post.

 

[oronocova]

Yes, it will work fine. Short runtime yes.

Awesome... thanks for the info!

 

[ampdude]

Mark at LF may be coming out with a 7.2V IMR E-series bulb.

He hasn't confirmed yet, so keep your ears peeled. :)

 

[mdocod]

Correct, that will work fine...

All right, thanks. but will the LF EO-4 at least work fine running off one of these cells? It only pulls 2.35 amps:rolleyes:.

500th. Post.