Plasma Lightbulb

[lasersandlights]

How can I make a flashlight with this bulb from Luxim?
http://www.lifi.com/dynamic/display.php/71
20,800 lumens, 28V, 9.5A, I think that 10 18650s would be able to give it 15 minutes of run time, but I'd probably also need to install a fan.

 

[65535]

.....

 

[The Dane]

I don't think you can, it's pretty specifically designed for 110V operation, and it's big.

Errrrrr NO!
It's 28V DC and the head is 4" diam and 3" long. The ballast is 7½x3.3x1.3".

The main problem is a decent reflector, because it's all flood.

 

[^Gurthang]

Yep, 28 Vf @ 9.5A. So a 8X 26500 pack could drive it. Just need to machine a body tube & adapter to mount the bulb. Course it would deserve to be named after one of those historic big guns like "Big Berth".

^G

 

[LEDninja]

I think that 10 18650s would be able to give it 15 minutes of run time

If you are thinking regular Li-ions NO.
You are discharging the cells at 4C or double the safe limit. PLease read the post in the following link carefully:
http://www.candlepowerforums.com/vb/showthread.php?t=235164
A man in BC died last week because his laptop caught fire while he was asleep.

Emoli or IMR cells such as ^Gurthang's 8X 26500 pack can probably handle the current but can the rest of your build?
9.5A is roughly 3/4 the amps of an electric frying pan so your wires should be the same gauge as are the connectors.
The bulb is in the 250-300W range so metal stands, shades; ceramic bulb holder etc (no plastic).

And do think what 20,000 lumens close up can do to your eyes.

 

[MrNaz]

If you are thinking regular Li-ions NO.
You are discharging the cells at 4C or double the safe limit. PLease read the post in the following link carefully:
http://www.candlepowerforums.com/vb/showthread.php?t=235164
A man in BC died last week because his laptop caught fire while he was asleep.

Emoli or IMR cells such as ^Gurthang's 8X 26500 pack can probably handle the current but can the rest of your build?
9.5A is roughly 3/4 the amps of an electric frying pan so your wires should be the same gauge as are the connectors.
The bulb is in the 250-300W range so metal stands, shades; ceramic bulb holder etc (no plastic).

And do think what 20,000 lumens close up can do to your eyes.

Yes, I think we've just discovered that there is such a thing as "too bright".

The sheer power dissipation needs and brightness of this thing should give you cause for pause. A 20,000 lumen unfocused emitter *will* permamently damage your vision after just a few seconds if looked at from a few feet away. Focus it and you have a visual death ray.

I highly recommend leaving this project on the "fanciful but impractical" list, and shelve it. There is no practical use for a portable 20k lumen lamp that runs for 15 mintues.

Stick to LEDs. They're more fun.

 

[Linger]

+1 to the above.

But did anyone notice the 95 CRI! wow...

 

[karlthev]

+2. I have several of the "Big Guns" HIDs and Hotwires and really don't use them much for practical applications rather as party entertainment.



Karl

 

[bshanahan14rulz]

hah, this plus a gigantic aspheric lens = moon illumination

If you are the safest person in the world, make it a thrower flashlight, but seriously, 20k lumens is a lot.

 

[StarHalo]

This call for moderation is very unflashaholic-like; if you've seen a rural HID area/security light, you've seen a 20,000+ lumen bulb. It's obviously not something you'd want to look into at close range, but no one looks into their novelty hotwires anyway..

I'd definitely go with a lantern/top-handle style format, and as reflectors go, you'll need something that's size-wise on par with a commercial salad bowl, i.e. whatever is the largest you can find/improvise. If it works out, it'd be like carrying your own stadium light..

 

[VidPro]

for a power source you might think of using a warp coil.
or a pair of these at 10lbs each , regulated
http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=5062
LiFePO4 26650 Battery: 38.4V 13.6Ah ( 522.24 Wh, 40A rate, Ebike terminal) with PCM for E-bike

 

[Oznog]

Wow, anybody know more about them? All I see are press release propaganda. Is it actually manufactured? Is it purchaseable?

This appears really different than anything else, I'd like to know more. Does the BULB itself take 28V, or is there a ballast that converts 28v to some higher voltage?

I don't even see terminals there... did they leave them off the spec sheet for artistic purposes? Is it microwave-pumped or something?

http://www.jimonlight.com/2008/11/14/lifi-lumens-per-watt-of-the-future/
OK, yeah, it's got a major complex ballast because it's microwave-pumped. The ballast could be made to any voltage, though.

 

[VidPro]

there is a good size ballast , check the data sheet, http://www.lifi.com/dynamic/pdfs/ProductBulletinLIFI-STA-40Series-19June2009.pdf
it has the size specs at the lower part of it.

it is sorta like microwave , radio waves?
http://www.treehugger.com/files/2008/04/luxim-plasma-lifi-light-bulb-led-cfl.php

the spectrum is amasing if it actually can do that.

 

[Oznog]

it is sorta like microwave , radio waves?
http://www.treehugger.com/files/2008/04/luxim-plasma-lifi-light-bulb-led-cfl.php

the spectrum is amasing if it actually can do that.

Microwaves are a form of radio waves. And it's exactly both.

I wonder if their 120 lumens/watt includes the ballast losses, or is based on microwave energy going to the bulb vs light output. See LEDs often ignore that ugly question, they can lose a LOT in the driver. Looking up consumer microwave ovens, they're only like 65% efficient. So 120 lumens/W might be 78 lumens/W from the wall if they didn't include that loss (but we don't know).

Oh, wait, the spec sheet DOES kinda let that slip. Says 20800 lumens, nominal 267W in. That comes to... 77.9 lumens/W! Wow, my guesstimate hit that one right on the nose.

 

[bshanahan14rulz]

I still say make it a laser. find/make a big aspheric and have it focusable out to a 1000 yards. Just imagine: this baby can burn trashbags at 1000 yards. It will also ignite the leaves therein :devil:

 

[VidPro]

Oh, wait, the spec sheet DOES kinda let that slip. Says 20800 lumens, nominal 267W in. That comes to... 77.9 lumens/W! Wow, my guesstimate hit that one right on the nose.

wow, i was wondering HOW they got that many LPW when many of the lumens on the design are lost, in the "back"

 

[lasersandlights]

So it is possible to build one of these? What battery source would be recommended? I am only looking for 5 minutes per charge.

 

[VidPro]

would all the watts of waves (of any kind for that matter) , enough to excite a bulb into plasma be able to be held close to ones person? or were you planning on mounting it in the back of a truck tank light style?

 

[65535]

So it is possible to build one of these? What battery source would be recommended? I am only looking for 5 minutes per charge.

Batteries don't last at 5 minute discharge, only acceptable cells would be A123 systems.

 

[lasersandlights]

would all the watts of waves (of any kind for that matter) , enough to excite a bulb into plasma be able to be held close to ones person? or were you planning on mounting it in the back of a truck tank light style?

Yes, it would be a handheld unit.