Anyone who wants to try to magnify a source of light so that it is smaller than the source (without losing any light) with any combination of mirrors or lenses can use this simulator: phydemo.app/ray-optics/simulator/. But here is a reminder. All real sources of light emit light in at least 180 degrees. So in the simulator, you can't use a source that artificially emits in less than 180 degrees (you have to use point sources of light, you can line them up in a row to make a source that isn’t only one point). I made one setup with one LED bit.ly/3SawbxB and one with two LEDs bit.ly/3zQcjJJ. You can use the "detector" to see if you can get more light in one area than at the surface of either LED. Good luck!

<a href="#" class="seekto" data-time="104">1:44</a> - So bright, it even convinced the rooster!

How to annoy all astronomers in a 10 mile radius

That rooster got confused and at once he literally shouted, “IT’s MORNING!!!!” 😂 <a href="#" class="seekto" data-time="102">1:42</a>

Vampires when they get blasted with 200k lumens

<a href="#" class="seekto" data-time="81">1:21</a> a shot of the average lifted truck behind me on the highway

This is the flashlight horror movie victims need

I’m a fan of your videos because there is always a little bit of info that I never knew. I’m 44 and I learn something with each video. Never stop learning.

Even the rooster was fooled 😂😂

"This is the world's brightest flashlight" *instantly flashbangs us*

<a href="#" class="seekto" data-time="100">1:40</a> Rooster: It's morning?

Easy way to destroy homework😏

In the army, we had these surefire mounted gun lights. It was called the Hellfire. Would burn your hand if you put it in front of the beam. But the coolest thing was when you put an IR filter on the end of the capsule. And put on NVG's. Could see for a half mile and no-one even knew you were there. You should get something like that for this flashlight.

The rooster woke up lmao

I read a funny Reddit post by a delivery driver who was having trouble finding the delivery address one night, so he called the recipient. The guy said "tell me when you see it" and turned on one of these bad boys (an earlier model). The driver was like "when I see _what,_ man - oh never mind I see it!"

<a href="#" class="seekto" data-time="44">0:44</a> old minecraft render distance

<a href="#" class="seekto" data-time="474">7:54</a> "I used the stones to destroy the stones"

New home defense option, death ray.

That poor table has been through so much fire.

<a href="#" class="seekto" data-time="228">3:48</a> funniest part of the video for me. 😂

<a href="#" class="seekto" data-time="68">1:08</a> neighbors: BRO I AM JUST TRYING TO SPEEP

"Give me your money!" [Turns this thing on] "Hu- HaaaAAAAAAAAAAAAAAAAAAaaaaaaaaaaaa.........."

Shine this light in the worlds blackest room

Wow, James, thanks, this was the the most complete explanation I think I've ever heard about how that light concentration limitation works. I actually don't think I've heard anyone really give much of an explanation of that before. Well done!

Love this guy. Hope he never leaves The Action Lab. Such a joy watching his experiments and reactions. And he explains everything so well.

New Styropyro questline started

Somebody needed a tax write-off for a flashlight they wanted really bad. 😁

<a href="#" class="seekto" data-time="120">2:00</a> Use Red filter on the magnifier lens.. I called this *Hellish Light* Where you can burn all things through contact😁😁

*Mick Dundee (Paul Hogan),* 1986: "That's not a knife… THAT'S a knife" *James J. Orgill,* 2024: "That's not a flashlight... THAT's a flashlight."

<a href="#" class="seekto" data-time="104">1:44</a> The rooster thought it was morning)))

Action Lab:"You can't break the laws of thermodynamics. " Styropyro: " Hold my laser pointer!"

This is seriously one of my favorite channels in all of KZfaq and i'm not even exaggerating

This is so interesting, thank you for the explanations :)

Next video he's gonna create a sun

It's almost as bright as Battlefield 3 flashlight

Damn you woke that rooster up ........😅🤣..!!

'wherever I shine it, a cockerel crows'

That's hilarious! "It's time to wake up" and then as soon as you turn on the flashlight, a rooster immediately wakes up.

I WANT THIS IN AN HORROR GAME! <a href="#" class="seekto" data-time="38">0:38</a> probably blinded a couple of Astronauts 😂 <a href="#" class="seekto" data-time="103">1:43</a> Yep the rooster thinks that it is daytime 🤣

Firefighters: So how did the fire start? Me: turning on a flashlight

here's the thing.. that flash light wasn't one big light source but lots of tiny light sources. And while you couldn't shrink a light smaller than its original source you absolutely could focus all of the little light sources into one area the size of one single light source and that would have given you a higher temp and that laser beam effect you were looking for.

There was an opportunity to have someone in the town when the flashlight was aimed at the town, and have that person record if they saw the flashlight.

<a href="#" class="seekto" data-time="103">1:43</a> The light was so bright the rooster thought it was morning 🐓🌄😂

You pull this one out when a drunk annoys you in the street in the evening. He'll have an alien abduction story the next day.

That is an insane light. The amount of particulates in the air is stunning to see. I have experienced this with underwater fishing cameras. Most of these cameras have lights and IR lights that shine straight ahead. The reflecting and flaring off of particulate matter in the water column renders these cameras almost useless. The video looks like a snow storm or blizzard. However, I rigged mine up with a waterproof light that sits well above the camera and shoots down at a slight angle, preventing flare and you can see perfectly. It would likely stun us to know how many micro-grams of particles we breath in daily.

Nitpick: You're not "magnifying" the light, you're concentrating it.

Imagine taking it outside in night and u saw a grandpa passing by with the stick on ground tell me how will be his reaction😂😂

What an awesome episode! Very informative thank you

<a href="#" class="seekto" data-time="101">1:41</a> dayum, even the rooster thought it was morning already. XD

Imagine how confused the animals would be, turning this thing on and off during a total solar eclipse.

Bro woke up the rooster. 😂😂

Upon seeing the flashlight in the dark... "It costs 400,000 dollars to fire this weapon, for twelve seconds"

You're waking up the plants with that bright Flashlight! let them sleep lol

Whenever the light is on the table , I can't stop thinking of what is happening on the ceiling.

Been asking in the comments for about a year to magnify the 100k lumen flashlight no one ever did I thought it be interesting. Thanks for doing this

If you wanted to capture all the light and then focus it to a point, you would need a much more advanced mirror array to take all the light and reflect it inward to a point/collector. An example of this in the real world would be a solar power tower. So basically infront of the flashlight would be a bunch of mirrors all angled correctly to take that light and focus it to a point. Once that is achieved you could then attempt to use a magnifying glass to further condense the light to an even a smaller point. In the case of a solar power tower, the mirrors on the ground reflect the sun light in an area to point directly at the top of the tower in the middle of the array which heats water in a tank to create steam to run a turbine creating electricity. Same princable here just at a much smaller scale. Great video!

That's not a flashlight, that's a weapon. Lol

<a href="#" class="seekto" data-time="220">3:40</a> no impact on your fingers

I just instantly thought of how useful this flashlight will be in scary games where they give you those tiny flashlight that only shines 10% of the screen.

When he did the headlight comparison test, I literally squinted my eyes even though my phone didn't actually get any brighter. That thing is a photon monster.

I feel like this man erased my memory in <a href="#" class="seekto" data-time="2">0:02</a>

Uber eats: I cannot find your house Me: Look at the sky, follow the light Uber eats: Wh- OMG I SEE IT

Haha, funny that you added that rooster sound for that moment when you shone your --flashlight-- flood light on a wide area of the town!

<a href="#" class="seekto" data-time="50">0:50</a> Looks familiar... Isn't it the same parking lot where Veritassium tested night vision goggles? He is lucky to miss your test.

Personally night hiking with my dogs in the Oregon woods became one of my favorite hobbies once I bought a powerful 18v Ryobi One+ flashlight with multiple rechargeable batteries. It's so bright, shines so far & has great battery life. That it makes hiking at night so fun! I can light up things multiple football fields away so the more i got used to exploring in the woods at night the more i learned that I can scan my surroundings as I walk and most of the time I can see if there's any critters around me due to how reflective their eye's are from my flashlight. This gives me a better understanding of my surroundings. Obviously it's not perfect so I also carry a airhorn on the side of my backpack, a telescopic baton in my pocket and a few helpful things in my backpack just in case. You never know so it's better to just have things with you and not have to use them compared to something unexpected happening and not having something on you. Regardless once you start getting more used to exploring the woods at night it actually becomes such a uniquely wonderful experience. You learn to become more in tune with your senses and your sense of direction and your overall perception as a whole.

<a href="#" class="seekto" data-time="37">0:37</a> "That's as bright as the bat signal" *Points it at the trees* "Nevermind, that's the sun"

I’m gonna need this walking in the woods at night

I'm not sure you can assume sun-like temperatures for a source based on wavelength similarity. The rate of radiative heat transfer is based on the temperature of the source and the sink. I'd guess that the maximal temperature is either a) the junction temperature of the LED (~350K, too cold, paper ignites ~ 500 K) or b) an effective temperature based on the light output (math below). The energy of each photon emitted by the LED: E=hc/λ where h is Planck's constant (6.626×10−34), c is the speed of light (3E8 m/s), and λ is the primary wavelength of the emitted light. For an example λ=500 nm, E=3.976E-19 J. The effective source temperature could be estimated by equating the power of the emitted light to the radiative power of a black body at the source temperature, T_source. Using the Stefan-Boltzmann law for power radiated by a black body: P_light=σA(T_source^4−T_a^4) With an example power of the emitted light (P_light): 0.3 W, ambient temperature (T_a): 300 K, surface area of LED (A): 1E-4 m^2, and solving for T_source: T_source^4=(P_light/σA)+T_a^4 Substituting the example values, T_source ≈ 783.7K If true, it's no surprise that the LEDs can back-drive enough heat to melt themselves, since the effective temperature is 300-400 K above the junction temperature. You could measure the total energy flux by measuring how quickly the beam can heat a matte black target from Temp 1 to Temp 2 and estimate the source temperatures from that.

The issue with you bringing up the conservation of Etendue in this context is that you're treating "the flashlight" as "the source" of light. There are 32 LEDs which are individual light sources. The way to magnify this would be to take the lens off the end and create an array of optics to redirect each LED inward toward a predetermined focal distance. You could get an area the size of one LED to have 32 times the the energy of just putting something on the flashlight. More, actually, since the area between the LEDs counts as area on which the energy is being spread across.

Imagine seeing a skinwalker in the forest while using this flashlight

Now the creatures lurking in the woods can be seen so much easier

<a href="#" class="seekto" data-time="37">0:37</a> Every astronomer in the country: "STOP THAT!"

$749.00! It should cook the Moon for that price! Great video!

"This is the world's brightest flashlight" Proceeds to THINK FAST CHUCKLENUTS

You took it way better than I would after burning out a 500 to 700 dollar flashlight... lol

You would never get scared with this one in the dark....😂

not to suggest that this technique would break the etendue thing, but in terms of achieving the hottest point from a light source I would think that if you arrange the source -> collimating lens -> focusing lens -> target, would get the most energy of the source onto the smallest point.

<a href="#" class="seekto" data-time="60">1:00</a> the birds must be thinking its already daytime 😂.

Gonna bring that to the spooky forest when it’s foggy in night

Cool experiment. How about putting a conical tube made of mirrors or reflective material on the flashlight? Then putting a magnifying lens on the small hole at the end?

THATS BRIGHT

Cool, now I just need your mom to stand on one of the hills and turn on the flashlight to have a solar eclipse

Fracture, magnify, and recapture is how you get it smaller and hotter

<a href="#" class="seekto" data-time="243">4:03</a> Oh, a paper that gets really hot actually starts burning?!?! I'm as surprised as you! 🤣😆🤣 BTW, love the quote from Arthur Eddington!

one day this company will make a artificial sun.😂

Bro: You have a Lighter? Me: Take's a FlasLight

@<a href="#" class="seekto" data-time="87">1:27</a> are the headlights on high beam? Because full beam won't reach your eyes with full intensity; it's designed not to blind other drivers. You can adjust the height or just use high beam (fog lights) which are designed to light up everything in front of the car with full intensity. You prob know this, but just thought I'd say.

This looks super unsafe... Can't believe he's willing to put his hand that close to the focus

Imagine that thing on a police car on a swivel mount. Talk about getting spotted

That Kukdoo-koo when Light was switched ON👀

What if the creation of this company and their goal of creating the world’s brightest flashlight is a result of the original company owner’s unimaginable fear of horror game scenarios

<a href="#" class="seekto" data-time="312">5:12</a> but isn’t the LED just a glass cover of the actual light source?

I love that quote at the end 😂

Styropyro with a comically large laser pointer: "Lmao"

Video's point starts in <a href="#" class="seekto" data-time="209">3:29</a>. How hot can we bring on - <a href="#" class="seekto" data-time="285">4:45</a> What happens if you put against the mirror <a href="#" class="seekto" data-time="462">7:42</a>

Yo the rooster was like Am I a kind of joke to you <a href="#" class="seekto" data-time="212">3:32</a>

Egad😱Wonder what the battery life is?

This foo really woke up all the birds and chickens lol

300k lumens will basically be how to annoy every living astronaut not on the moon

FlashBang 😂😂😂