16 full length AA in Mag 3D w/o extension = 200W superbulb stealth light (beamshots!)

Techjunkie

Enlightened
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Nov 16, 2007
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Location
in the brightly lit suburbs of NYC (Long Island)
As always for me, this is a poor man's project so most of the parts are home made, with the exception of the KD reflector and glass lens, and the Kiu high temp socket. (I have plans and parts for a home made one of those but it will not debut in this project.) If you've seen my first hotwire, you'll recognize that the host and basic idea have been recycled here, but significantly improved upon.

This as-yet-to-be-named (suggestions welcome) torch I've built is not easily identifiable as anything other than a stock Mag 3D from the outside, but on the inside, it packs 16 Duracell Pre-Charged AA batteries and an Osram Halostar Starlite bulb, 64458-S.

That bulb is pretty high up on Lux's Most Powerful list (currently #4 - the DeathBlaster), and according to Lux's incandescant bulb tests, cranks out over 8000 Lumens (11,000 theoretical) when driven as it is here, to >200 Watts. Props to Lux for all his hard work. I'd probably have lost interest in different hotwire possibilities by now, if not for his charts.

The batteries have only been stripped and re-wrapped because their original shrink wrap was so badly damaged by threaded rods in an un-bored host. They're also a bit dented/crushed from a previous experiment which ended badly. I wonder if the tailcap wouldn't screw on all the way if I bought new batteries.:rolleyes: --edit: no longer a concern since adding the foam as a spring :--

To make room for the width of the 16 rechargeable AA batteries in a 4x4 stack, the host has been honed out, not bored. To make room for the length (the real challenge), the base of the bulb/switch assembly has been trimmed within one or two mm of the switch contact and the whole switch assembly sits a few mm higher than usual with the switch button off center, a few mm north of usual. I had to trim the top side and length of the button somewhat, to keep the rubber boot from forcing the switch into the momentary-on position. (Almost burned my fingers figuring that one out.) The tailcap has also been trimmed (sanded) to reduce how far it extends into the flashlight.

There is not a single contact spring throughout the entire flashlight (there's no room). All the contacts are constructed of rivets and sheet metal, and the flashlight body is not part of the circuit. The pos and negative termination points of the battery "pack" are embedded in the base of the switch/bulb assembly.

I'll let the captions in the pictures do the rest of the explaining rather than run on here.

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For my next project, I'll be running a 24V super-bulb in a stock-looking 4D host on 20 AA batteries. The shame of it is, unless I discard the 150W bulb I've got ready for that project, it wont be brighter than this 3D, but it will run longer. (Maybe I'll try a 250W bulb instead.)

Now to name them...
 
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Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

Very nice. There's a lot of thought gone into that :)
 
Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

The batteries look ruined/crushed - I would not feel save stressing them out with too much load.

Still a good project. :thumbsup:
 
Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

K-T, that's precisely why I don't use lithiums :D. I have to say that if I had not already completely shorted out a few of these (which I've since discarded after their skin boiled off and top caps melted, but no explosion) and crushed a few others far worse (also disposed of), I would have thrown these out already.

The batteries shown loaded in the tail end are actually the worst of the bunch, and the camera flash made the dents look worse than they really are. I've depleted them and charged them for several cycles since they've sustained this damage, and so far, perform no worse for the wear. I inspect them carefully every time I unload/recharge/reload.

Safety is VERY important though and by no means do I recommend anyone to use batteries known to be damaged. That goes double for anything with Lithium chemistry (although I have seen video of NiMH batteries exploding).

These are, in my opinion, a very powerful and very safe brand of battery. based on my experiences. (If you had any idea how accident prone I am, you would know exactly what a big endorsement that is.) If Eneloops ever become affordable again (missed all the good deals), I look forward to (safety) testing some of those too.
 
Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

This is one of the grungiest mods I've even seen. But I applaud it. This is in the classical spirit of CPF, cramming as many batteries and the biggest baddest bulb in to a stock looking light. It wasn't that long ago that we didn't have Mac, lux or FM making custom bodies, parts and battery parts for pretty much simple drop ins.
 
Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

Nice mod!

I wonder how well it burns paper...
 
Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

I think you left something out................BEAMSHOTS!:poke:
 
Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

Ask and ye shall receive...

All beam shots taken with the same settings. The camera settings actually make the shots look darker than the scenes appear to the eye in reality. For example, look how dim the room looks fully lit with the hi-hat lights on full. (Then compare that to the last shot!):

30 feet away
200 ISO
F5.6
1/4 sec.
Exp. comp. 0
WB = Tungsten
fixed focus
24mm focal length
Canon Digital Rebel XTi

...and oh yeah, the newspaper lit almost instantly :D

Reference shot, lights on:
referenceshotlightson30ft.jpg


Reference shot, darkness:
referenceshotdarkness.jpg


Reference 2D supermarket flashlight (Garrity):
2Dsupermarketflashlight.jpg


High Pressure P60 equivalent:
6VXenonbulb.jpg


High Pressure P90 equivalent:
9VXenon.jpg


WF-500 Replacment bulb overdriven on 8AA in a Mag 2D (not showcased on CPF yet):
WF500overdrivento105v.jpg


My as-yet-to-be-named DeathBlaster equivalent:
LuxsDeathblasterequivalent.jpg


By the way, I do like the grunge-mod description :grin2:
 
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Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

:duck: I need sunglasses for that last beamshot.

Cool light. :naughty:
 
Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

:huh: :eek: :faint: :bow:

Wow... stock switch at ~10amps?

I happen to have a 3D here that I was going to mag85, but something like this seems much more fun.
~Dougk
 
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Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

Wow, that is an amazing light! I might have to look into building one of these things. What is the runtime?
 
Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

Wow, that is an amazing light! I might have to look into building one of these things. What is the runtime?

About 10 minutes to flat, but I only run it in 30 second bursts. If I want more runtime without completely reconfiguring the light, I switch the bulb with a Hikari 12V 35W G4 bulbs that crank out about 3500 lumen when overdriven using this config.
 
Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

:huh: :eek: :faint: :bow:

Wow... stock switch at ~10amps?

I happen to have a 3D here that I was going to mag85, but something like this seems much more fun.
~Dougk

If you can even call that switch stock.
 
Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

About 10 minutes to flat, but I only run it in 30 second bursts. If I want more runtime without completely reconfiguring the light, I switch the bulb with a Hikari 12V 35W G4 bulbs that crank out about 3500 lumen when overdriven using this config.

Thanks for the info! Sounds like a nice setup.
 
Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

I considered replacing the switch with something else, but grew impatient looking for something else with the same action. Maybe I'll do the FET mod eventually.

I'm thinking something like this might do nicely, similar to USL:
t_ill_round_rocker.jpg
 
Re: 16 full length AA in Mag 3D w/o extension = super-bulb stealth light

:duck: I need sunglasses for that last beamshot.

Cool light. :naughty:
Right.......Imagine blasting an intruder in the face with that, I think you might scorch his retinas!
 
I slipped an Osram 64633 15V 150W bulb in this torch on batteries that were already somewhat stressed from about a minute of use from the 64658-S bulb. I began with 14 batteries and worked back up to all 16. I'm pretty sure I'd pop the 15v 50hr bulb which is much less tolerant to overdriving than the 12v 4000hr bulb if the batteries were fresh off the charger, but putting that aside, wow! I estimate that under this load, the batteries are sagging to somewhere between 1.1 and 1.0 volts, or between 17.5 to 16v total. Lux charted this bulb, and at that voltage, puts the measured lumen count about the same as the 65658-S on fresh batteries, but the lux measurement almost doubles.

This bulb's transverse filament results in a more defined hotspot than the 64458-S's tall axial filament, which spreads the light out more uniformly. The result is a hotter hotspot and more throw. I think it's whiter too.

Beamshots:

Reference shot - room lights on:
referenceshotlightson30ft.jpg


Osram 64458-S (original)
LuxsDeathblasterequivalent.jpg


Osram 64633 (new)
OSRAM64633-16AA.jpg


Not sure which bulb I'll keep in it. :sssh: I'll let the batteries decide.
 
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