My 20W Browning LED flashlight can start fires and it's about 4-1/2 inches by 3/4 inch (it runs off a 6V lithium setup using 2 CR123 batteries). The lens assembly ends in a 1 inch diameter piece and it's intended as a tactical spotlight. It's a single Luxeon Rebel Star 20W LED.
this was awesome i have one of those very high powerd lights i think it was either 1 billion or 100 million candle power cant remember but im pretty sure after a long usage you could cook something with one of these thing.
Your explanation is probably wrong. It's NOT the light you are focussing which starts to heat and burn the materials. It is probably the INFRA RED frequency which you are (also) focussing. This is why the laser does not burn, because it has just visible light not the infra red (it's probably laser light from a semiconductor laser). The flash light has a halogen or tungsten bulb which creates lots of infra red and only a little light.
You are focusing visible light AND infra-red from a torch but only visible light from a laser. What else is your explanation for the laser not burning?
Acrylic transmits IR, usually around 90%. It's possible to get acrylic in forms that completely block visible light yet transmit IR. Don't just refer to some other video using materials you don't know the specification of.
A CO2 laser (cutter), for example, produces a beam of infrared light.
Very interesting, thought provoking and entertaining as always! Would you expect a greater thermal energy level based upon one source color vs. another? White is all colors (except in LEDs) but is there one higher powered color component that stands out above the rest within white light? If so what is the frequency of that highest thermal energy light? Would it be in the infrared range? Red? Green? Blue? I am anxious to see your high powered laser and source. Thanks for all you do!
@xxx777aaa It turns out my question is somewhat elementary. Energy vs. frequency are widely known in physics. In simple terms gamma rays, the shortest rays, which are also the highest frequency waves, contain the most energy per photon. At the other end of the spectrum, radio waves contain the least energy. Within the visible range, since blues and violets have the shortest wl they contain more energy per photon than the longer reds & IRs. It makes sense that UV causes skin damage & cancer.
NOCNOT: I can tell you this: we used to have heat lamps on the farm for raising young chicks and piglets. They tended to be orange in color - that would suggest infrared would be the best bet.
I love HID and LED, they are creating cool bright lights. HID is commonly use on most projector lamps, cars and truck. I see some on autoshops and they uses ballast on it just like fluorescent lamps to step up the volts to several thousand. LED operates on a lower volts. Both are efficient lighting device.
If you move the led light that has three leds in it, closer to the lens you can focus in on the chip inside those as well as the fine wires in the corners of the chip.
Each object filters some light and the focal points would be all wrong. When light passes through or is reflected off an object, roughly 10%-20% is absorbed, So mag glass 90% output to the cry bal 90% x .9 =81% out to parabolic 81% in x.9 = 73% out. at lest 27% drop in power. You cannot amplify light, just concentrate it with lenses.
I would have never believed you would be able to concentrate a flashlight to the point it would burn anything...that was really cool. You make the best video's ever! I think my kids learn more from your video's than they ever learn at school...
Each object filters some light and the focal points would be all wrong. When light passes through or is reflected off an object, roughly 10%-20% is absorbed, So mag glass 90% output to the cry bal 90% x .9 =81% out to parabolic 81% in x.9 = 73% out. at lest 27% drop in power. You cannot amplify light, just concentrate it with lenses.
Your crystal ball demo reminded me on a website (easy enough to search for) of a guy who put a lot of effort into demonstrating that you can easily start a fire with a ball of ice. He also worked on ways to make it practical to actually achieve "in the wild." Interestingly, he realized that it wasn't necessary to try to get a perfect sphere, because you could just rotate your irregular ice to find a spot that "worked."
Note to any one who mite need to start a fire with a flash light? IN AN EMERGANCY TYPE SITUATION, if you cary some fine grade steel wool in your kit, and contact both ends of the batery of you flashlight with it, it will make red hot metal embers that easly start a fire.
This flashlight produced over the eight minutes that it took to start boiling the water approximately 16 BTU which is equal to 16 wooden kitchen matches.
For the comments about why, it's just an experiment for the sake of argument. It has no practical use just testing potential. Dan is pretty prone to keeping himself amused by doing experiments of "I wonder if I can achieve X result using Y materials". Nice use of the materials Dan, but I was surprised you didn't gang up the focal materials to further condense the energy. I guess you tried and reached diminishing returns. Parabolic through the magnifying glass seems like it would have worked.
@madjimms Not really, in order for this to be viable you would need to be stuck in a survival situation with a high power flashlight, and focusing tools and combustible materials and nothing else. And even then it would be more viable use the battery and 2 pieces of wire with the ends stripped to generate sparks and start a fire from that. Using the flashlight consumes a lot of energy and you have no way to renew that source.
@robohobo9001 Then what do you call a burning stick with a burning rag at one end? That's what WE call a torch. An object with a light that uses batteries is something entirely different than a "torch", which is why we call it a flashlight.
Well, it's pretty much only in the U.S. that people call it a flashlight. and if you think about it "flashlight" doesn't make much sense. It would be less useful if it flashed.
I really don't see the point in this. It seems more efficient and compact just to use a lighter.. cause you still really have to use a lot of power for this and the torch isn't really that compact..
@ksss2000 This is more about how mirrors and lenses and focal points work. And about how much energy you can get out of (sun)-light, even with rather low tech materials. You can also say that it is more about basic fundamentals then about showing an efficient and useful setup.
I like these videos and I think that Dan is doing a great job on explaining the basic fundamentals from solar energy. I guess it all depends on how you look at these videos.
There's probably a lot of heat at the source of that bulb at the filament. If you were to refocus that light from the bulb it makes sense that you should be able to recapture some of that heat.
not sure what your talking about with fake videos... my torch flashlight starts paper on fire in seconds
thats the only reason i bought it
Peezy716 2 months ago
remove the class of that Vector POB and clean it carefully, as you can see it's now a bit smokey. You'll have more output.
katajju 5 months ago in playlist PARABOLIC MIRROR CONCAVE SOLAR REFLECTOR
ordinary glass is practically opaque to IR
BrainWeather 6 months ago
"Sawdur stuff" ?
megatesla 10 months ago
WWWOOOWW I never seen this before thanx for sharing keep the videos coming!!
GOOD JOB!
dulsecielo 11 months ago
This has been flagged as spam show
From a Dire fan...
diysolarpanels100 11 months ago
From a fan...
diysolarpanels100 11 months ago
i just break the glass and put dry leaves in it....
VaconCamp 1 year ago
ocupo un flash de esos ^^
rocha1986sempai 1 year ago
I want to see a combo of the different magnifiers. :-) The crystal ball with the magnifying glass then the mirror would be cool to see. :-)
mondays89 1 year ago
i wanna c the laser! i have a green laser that can light a match and burn dark things:)
0MatthewThibodeaux 1 year ago
I have that same flashlight, it's soooooo bright its embarrassing to use it outside at night.
Deanzsyclone 1 year ago
My 20W Browning LED flashlight can start fires and it's about 4-1/2 inches by 3/4 inch (it runs off a 6V lithium setup using 2 CR123 batteries). The lens assembly ends in a 1 inch diameter piece and it's intended as a tactical spotlight. It's a single Luxeon Rebel Star 20W LED.
RyuDarragh 1 year ago
Where did you get that light? website?
ding0925 1 year ago
this was awesome i have one of those very high powerd lights i think it was either 1 billion or 100 million candle power cant remember but im pretty sure after a long usage you could cook something with one of these thing.
sousadude30 1 year ago
is that bluelight flashlight?
matataka 1 year ago
Your explanation is probably wrong. It's NOT the light you are focussing which starts to heat and burn the materials. It is probably the INFRA RED frequency which you are (also) focussing. This is why the laser does not burn, because it has just visible light not the infra red (it's probably laser light from a semiconductor laser). The flash light has a halogen or tungsten bulb which creates lots of infra red and only a little light.
johnjejo 1 year ago
Infra Red is not reflected good from acrylic mirrors.
watch?v=6mV4ecEbV1s
GREENPOWERSCIENCE 1 year ago 5
@GREENPOWERSCIENCE Think u missed my point.
You are focusing visible light AND infra-red from a torch but only visible light from a laser. What else is your explanation for the laser not burning?
Acrylic transmits IR, usually around 90%. It's possible to get acrylic in forms that completely block visible light yet transmit IR. Don't just refer to some other video using materials you don't know the specification of.
A CO2 laser (cutter), for example, produces a beam of infrared light.
johnjejo 1 year ago
@johnjejo well... infra red IS light. Is just not VISIBLE light :)
CosminRotaru 1 year ago
@CosminRotaru next you will say radio waves are light. :-P IR is not light, it's electromagnetic radiation as light is too.
johnjejo 1 year ago
I can't wait to see that cutting laser vid.
eddiequest4 1 year ago
what does this light cost?Thanks for posting!
tomterahedrob 1 year ago
Imax projector can light a 2x4 on fire lol ya know, just cause they are so easy to find in an emergency...
potatoradio 1 year ago
Dan Great video! very interesting stuff!!
RamoneTalarico 1 year ago
what do you have against black paper? it is because it black huh?
theafrodude22 1 year ago
Wow
dalbir122 1 year ago
Why not cross the battery terminals with steel wool and start the fire with less hassle.
Quillrun 1 year ago 3
watch?v=N449Ih3D0As
GREENPOWERSCIENCE 1 year ago
@Quillrun ; Because this is greenpower~science aparently
MrFreddyFeatures 8 months ago
kool
guitarpikz 1 year ago
Very interesting, thought provoking and entertaining as always! Would you expect a greater thermal energy level based upon one source color vs. another? White is all colors (except in LEDs) but is there one higher powered color component that stands out above the rest within white light? If so what is the frequency of that highest thermal energy light? Would it be in the infrared range? Red? Green? Blue? I am anxious to see your high powered laser and source. Thanks for all you do!
NOCNOTCAUGHT 1 year ago
lemme know if you get an answer to this question VERY GOOD QUESTION HERE!
xxx777aaa 1 year ago
@xxx777aaa It turns out my question is somewhat elementary. Energy vs. frequency are widely known in physics. In simple terms gamma rays, the shortest rays, which are also the highest frequency waves, contain the most energy per photon. At the other end of the spectrum, radio waves contain the least energy. Within the visible range, since blues and violets have the shortest wl they contain more energy per photon than the longer reds & IRs. It makes sense that UV causes skin damage & cancer.
NOCNOTCAUGHT 1 year ago
NOCNOT: I can tell you this: we used to have heat lamps on the farm for raising young chicks and piglets. They tended to be orange in color - that would suggest infrared would be the best bet.
bodryn 1 year ago
Haha, I love that you just do random stuff like this. It's mesmerizing. Keep it up, Dan, looking forward to the laser show. :)
joshcryer 1 year ago
So cool. What a wizkid!
seamstobe 1 year ago
I love HID and LED, they are creating cool bright lights. HID is commonly use on most projector lamps, cars and truck. I see some on autoshops and they uses ballast on it just like fluorescent lamps to step up the volts to several thousand. LED operates on a lower volts. Both are efficient lighting device.
Another great stuff from Greenpowerscience.
kaizercharles 1 year ago
good job Dan, very educational !
tranvo83 1 year ago
lol, the led shows looked like jelly fish!! awesome!
TheKlink 1 year ago
WOW! Thanks Dan, I'd never have believed that possible.
locouk 1 year ago
Great job Dan,
If you move the led light that has three leds in it, closer to the lens you can focus in on the chip inside those as well as the fine wires in the corners of the chip.
MUDDy
muddymuddymuddmann 1 year ago
Is it possible to further intensify the beam of light by reflecting the light from the parabolic mirror through a magnifying glass?
HHO4ALL 1 year ago
Each object filters some light and the focal points would be all wrong. When light passes through or is reflected off an object, roughly 10%-20% is absorbed, So mag glass 90% output to the cry bal 90% x .9 =81% out to parabolic 81% in x.9 = 73% out. at lest 27% drop in power. You cannot amplify light, just concentrate it with lenses.
GREENPOWERSCIENCE 1 year ago
Awesome. this also shows why it hurts your eyes to look into a flashlight! owch.
rainbowsalads 1 year ago
I would have never believed you would be able to concentrate a flashlight to the point it would burn anything...that was really cool. You make the best video's ever! I think my kids learn more from your video's than they ever learn at school...
pvampire 1 year ago 4
:-) Thank you so much for the great comment!
GREENPOWERSCIENCE 1 year ago
The 3 leds look cool on the board :)
social3ngin33rin 1 year ago
This guy can start a fire with anything!
Shaunt1 1 year ago
Have you done any experiments with TESLA coils?
johnny102marvin 1 year ago
Dan,
who makes this flashlight and where is in made??
aceyorba 1 year ago
great video. What wavelength is that lazer, btw?
TheQuiescentSquall 1 year ago
Why is it that solar hobby guys seem so intent on starting fires?
Probewitch 1 year ago
Why not shine through the magnifying glass into the crystal ball and off the mirror?
VirtualSquirrel 1 year ago
Each object filters some light and the focal points would be all wrong. When light passes through or is reflected off an object, roughly 10%-20% is absorbed, So mag glass 90% output to the cry bal 90% x .9 =81% out to parabolic 81% in x.9 = 73% out. at lest 27% drop in power. You cannot amplify light, just concentrate it with lenses.
Dan
GREENPOWERSCIENCE 1 year ago
Your crystal ball demo reminded me on a website (easy enough to search for) of a guy who put a lot of effort into demonstrating that you can easily start a fire with a ball of ice. He also worked on ways to make it practical to actually achieve "in the wild." Interestingly, he realized that it wasn't necessary to try to get a perfect sphere, because you could just rotate your irregular ice to find a spot that "worked."
Search for "making fire with ice"
GetMeThere1 1 year ago
I love all your videos. Thanks
pitchwest 1 year ago
Note to any one who mite need to start a fire with a flash light? IN AN EMERGANCY TYPE SITUATION, if you cary some fine grade steel wool in your kit, and contact both ends of the batery of you flashlight with it, it will make red hot metal embers that easly start a fire.
TheBattleWagon 1 year ago
@TheBattleWagon good point.
watch?v=N449Ih3D0As
ohmslaw111 1 year ago
@ohmslaw111 BoyScoutsOfAmerica.
TheBattleWagon 1 year ago
Dan you would love the sun power in Arizona
scoobydog411 1 year ago
Dan.... please stop blinding us. Thank you.
iulian28ti 1 year ago
This flashlight produced over the eight minutes that it took to start boiling the water approximately 16 BTU which is equal to 16 wooden kitchen matches.
ke4uyp 1 year ago
does the black flashlight (Torch) say police?
emonoddy 1 year ago
Yes, it is a flea market gimmick;-)
GREENPOWERSCIENCE 1 year ago
@GREENPOWERSCIENCE Ahhhh, fair enough :]
emonoddy 1 year ago
@Dan
Crystal ball, are you sure? Is it made of acrylic or polycarbonate?
jugglermartin 1 year ago
Where did you buy the crystal ball and base?
hughtub 1 year ago
For the comments about why, it's just an experiment for the sake of argument. It has no practical use just testing potential. Dan is pretty prone to keeping himself amused by doing experiments of "I wonder if I can achieve X result using Y materials". Nice use of the materials Dan, but I was surprised you didn't gang up the focal materials to further condense the energy. I guess you tried and reached diminishing returns. Parabolic through the magnifying glass seems like it would have worked.
psynthpriest 1 year ago 2
This would be very useful in a survival situation.
madjimms 1 year ago
@madjimms Not really, in order for this to be viable you would need to be stuck in a survival situation with a high power flashlight, and focusing tools and combustible materials and nothing else. And even then it would be more viable use the battery and 2 pieces of wire with the ends stripped to generate sparks and start a fire from that. Using the flashlight consumes a lot of energy and you have no way to renew that source.
psynthpriest 1 year ago
cant you put all things in a row
sillu129 1 year ago
in england we call a flashlight a torch
robohobo9001 1 year ago
@robohobo9001 Then what do you call a burning stick with a burning rag at one end? That's what WE call a torch. An object with a light that uses batteries is something entirely different than a "torch", which is why we call it a flashlight.
hughtub 1 year ago
Well, it's pretty much only in the U.S. that people call it a flashlight. and if you think about it "flashlight" doesn't make much sense. It would be less useful if it flashed.
PerfectParasite 1 year ago
@robohobo9001 and u guys call cigarettes fags lol it always makes me chuckle when i hear that one hehehe
youngn420 1 year ago
This is just great...you give me ideeas now...not on how to start a fire he he...but doing something intresting..:)
olahmarcusfilms 1 year ago
its not fake and its awesome.
09876124 1 year ago 2
I really don't see the point in this. It seems more efficient and compact just to use a lighter.. cause you still really have to use a lot of power for this and the torch isn't really that compact..
ksss2000 1 year ago 2
@ksss2000 This is more about how mirrors and lenses and focal points work. And about how much energy you can get out of (sun)-light, even with rather low tech materials. You can also say that it is more about basic fundamentals then about showing an efficient and useful setup.
I like these videos and I think that Dan is doing a great job on explaining the basic fundamentals from solar energy. I guess it all depends on how you look at these videos.
Peace, iT
insAneTunA 1 year ago
Its just a demonstartion that you can start a fire with a flash light its not to tell people to start a fire with this instead of a lighter
coolio8444 1 year ago
show us the laser
many thxz criss
AsHwH 1 year ago 2
I just love flashlights, light sources in general
Cool video
CTOL1 1 year ago 2
Interesting. I never thought this would be possible.
FenderGibsonWashburn 1 year ago
There's probably a lot of heat at the source of that bulb at the filament. If you were to refocus that light from the bulb it makes sense that you should be able to recapture some of that heat.
Frosttty 1 year ago
HID' s dont have a filament
35w HID = same brightness as a 100w halogen
Yankeechief 1 year ago
so? stop this stupid comments!
SatansBaby1 1 year ago
First rate 5 stars
doug2877 1 year ago