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World's brightest flashlight

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LAN_403

Tesladownunder

Mon Sept 27 2010, 07:35AM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

84,000 lumens. 'nuf said.

GhostNull

Mon Sept 27 2010, 09:34AM

Registered Member #2648 Joined: Sun Jan 24 2010, 12:45PM
Location: Australia
Posts: 291

That *might* blind someone

Tesladownunder

Mon Sept 27 2010, 10:17AM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

Baaaaahhh. They probably deserved it!

Seriously. This will have a total light output of 150W (10% efficiency at 1500W input). So like a 150W laser unfocused to whatever beam size so a lot of total output. Sounds dangerous.
However,
A single 10W light output from a single 100W electrical input LED focused at 5 degrees is perhaps 20cm diam (= 0.04 m2) ,at 1m. i.e. 250W/m2. Sunlight is 1000W/m2 of which only 20% is visible. ie 200W/m2. It comes from a 1 degree source.
Hence at 1m, using back of an envelope figures you will see 11 large (5X) weak suns in a circle and a red, green and blue sun in the middle. You will blink and look away reflexively . You will not get an excessive dose as in a laser which will focus to a point and burn in a short time.
It should be fairly safe but still should not be used irresponsibly.

It is bright but not focused in a manner to cause damage.
I am much more concerned about my 40mW Blu-ray laser as an eye risk.

GhostNull

Mon Sept 27 2010, 12:59PM

Registered Member #2648 Joined: Sun Jan 24 2010, 12:45PM
Location: Australia
Posts: 291

Ah, okay then. Silly me >.<

Are you going to make a diffuser, reflective backing and that stuff?

Killa-X

Mon Sept 27 2010, 03:06PM

Registered Member #1643 Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039

Someone needs to tell wicked lasers that they no longer have "the worlds brightest flashlight" I think you won that!

Does it take giant batteries too? :P large pipe painted black with terminals, to look and act like a giant battery? :D

Tesladownunder

Mon Sept 27 2010, 07:16PM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

Killa-X wrote ...

Someone needs to tell wicked lasers that they no longer have "the worlds brightest flashlight" I think you won that!
Does it take giant batteries too? :P large pipe painted black with terminals, to look and act like a giant battery? :D

It's easy to make a claim and rather hard to refute, particularly if it has not appeared on the net. Of course, it's not always comparing apples and oranges. Like mine is not commercially useful, theirs is. Mine can't be focussed well, theirs can. Hence theirs will have higher peak intensity at a distance (candlepower) due to better focus. Mine has more total light output (lumens).

This project uses the same front end as is on the World's brightest bike light project. Best to read this thread with the other as well.
Batteries are the same 3 deep cycle batts. They will have plenty of room but will need an internal frame as the steel cylinder is quite thin.

GhostNull wrote ...

Are you going to make a diffuser, reflective backing and that stuff?

Nope. I want as tight a beam as I can ie 5 degrees. It's already hard enough to focus a source nearly 1 inch square. There is no back radiation.

The chrome plated "body" of the torch is a rubbish bin/trash can and the green front is the top of a plastic water tank. Each of the fans has the LED on the other side and a 10cm lens.

1285614033 10 FT97381 Ledtorchbintankfans

1285614311 10 FT97381 Ledbikefrontringarray

1285614733 10 FT97381 Ledbikeparcels3threefansfront1led

ConKbot of Doom

Mon Sept 27 2010, 09:46PM

Registered Member #509 Joined: Sat Feb 10 2007, 07:02AM
Location:
Posts: 329

Are those deal extreme 100W LEDs? They look similar to a lot of the high power arrays I see on there. I'd love to suggest SST-90's or CBT-360's from luminus, but I'm guessing the price point wouldnt be too nice on those.

Tesladownunder

Tue Sept 28 2010, 12:43AM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

Here is the eBay store I got theLED's, lenses and fans from.

1285634507 10 FT97381 Ledbikeparcels3leds

Adam Munich

Tue Sept 28 2010, 12:58AM

Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242

Wow, $100 a piece. I wish I had cash to blow like you.

Tesladownunder

Tue Sept 28 2010, 12:05PM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

Grenadier wrote ...

Wow, $100 a piece. I wish I had cash to blow like you.

Ahh, the politics of envy...
I have just worked at my day job (medical specialist doctor) the last 4 months at 100h per week. (15 hour days, 10h Sundays) How many did you work?
I don't own a car. Do you?
If you are a student, when you graduate and get a job, do you expect to work that much or expect to own a car.
Do the sums. Still wish for that?
I will spend $5000 on this project. The real cost is not that, it's the money I won't earn for the time I spend on the project - probably 5 times that amount.
So the real comment should be, "Why do you lose so much money by not working for that time".
The real answer is "how much is it worth to have the biggest and best in the world and be appreciated for it". Some people just want the best car in their street/suburb/town and pay a vast lot more.
Anyway, I am trying to commercialise the project - hence the video.

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