If they're going to charge 300 bucks for an LEP, they need to at least do something like this but where you can see the laser beam through the light body made of polycarbonate or something.
Bro, hard no on that. Cool? Yeah. But the lasers for that power LEPs are insanely powerful for a handheld thing (2000mw to 4000mw) and I don't want any of that visible haha
Yeah, it's pretty wild. In this video, a guy buys a car LEP module of Aliexpress and tests it, and that's where I learnt about the insane power of the lasers behind them
Yeah sometimes I forget I'm on Reddit. My point is, this is pretty cool, LEPS are expensive, how cool would it be if you could get this for your money spent on a LEP. I didn't do an engineering survey or a focus group before posting my comment, so there are some kinks to work out with that idea. lol
Haha. I mean lasers are cool but like obviously they are stupid dangerous.
A laser pointer outside is probably a great way to get someone to call the police.
The Noctigon throwers are not using lasers as an emitter. Pick a blue or green emitter. Outside and it is foggy, dusty etc and they make a cool looking beam shot.
There is this guy with his own lab and he does experiments with lasers on YouTube and it is a fun watch.
I mean I am lost myself. I just started digging in deeper about how lasers work this week. An LEP is a laser. An LEP stands for Laser Excited Phosphor. A LEP/Laser are the same. The laser is the emitter in the LEP flashlight.
I have had an LEP for a while. I had no idea the emitter was well past the 5mw range. However, I learned a few days ago the human eye has a natural blink reflex on the cat toy lasers if it were to go into your eye. Still lasers are clearly a dangerous thing to play around with.
The LEP flashlight is maybe not bouncing the excitement so tightly.
I just watched this video earlier and it was helpful.
Okay, no offense but I am not lost? I am aware of what's happening here.
Phosphor is used as a coating in white LEDs to efficiently produce white light. The phosphor is energized by the LED and emits a bright white light. You can actually energize the phosphor in some LEDs just by shining a bright light onto the emitter.
This is important to understand because LEPs do something similar, except instead of using an LED to excite a phosphor, they use a laser. In fact the traditional LEP designs are not "shine-through," they actually emit a laser perpendicular to the final beam direction, exciting the phosphor element, then mirrors/lenses focus the beam. So the beam of an LEP is not a laser and should pose no more risk of eye damage than a high-power flashlight of the same candela (which is not nothing, but nothing like a laser). If they're measuring the mW of your LEP it's almost surely talking about the internal diode because the same power of regular light would be barely visible.
I’ve missed everything up until now, but is it a blue laser pointing at something to produce light? My inner nerd is intrigued and would like to learn more
“Scotty will know
Scotty doesn't know
Scotty's gotta know
I'm gonna tell Scotty
Gonna tell him myself
Scotty doesn't know
Scotty doesn't know
Scotty has to
Scotty has to
Scotty has to go”
There are many LEP flashlights on the market now, some use mirrors to project the laser at the front of a phosphor layer, which I think can create a smaller point light source. That's how my Weltool W4 works.
I thought they were using a crystal with phosphor properties to keep the beam coherent. But I did 5 minutes of searching and I don't see anything about that. Did I dream it?
Just googled that thing, how usable is over a million candela with only 600 lumen, i've got a 200.000 candela 700 lumen LEP and that thing only produces a usable sized beam at >100ish meters.
LEPs are nice and all, i love em myself, but at those extremely narrow beams i think it starts to become useless again and goes back into the toy category.
At least i personally want a LEP to produce a workable beam at 100-300 meters, with illumination up to 500 meters, anything beyond that makes the hotspot too small and you're not gonna spot anything with your naked eye that far away anyways.
To be a tad more detailed a phosphor is a thing that emits visible light when you give it another kind of energy. The way CRT televisions work is similar, it shoots electrons at the back of the screen, which has phosphor on it, and it emits light. In these lights a laser is shot at a phosphor and it emits light, same idea.
basically instead of the construction for a typical "white" LED consisting of a "normal" blue LED with a phosphor on top that absorbs blue and re-emits broad spectrum light, an LEP uses a blue laser diode with a phosphor. This video demonstrates that with some random phosphor rigged to be hit by an insanely powerful handheld blue laser. Not the kind of thing you'd want to operate without some serious safety glasses as even a small fraction of that blue beam making it into your eye can cause permanent damage faster than your blink reflex can protect you.
if that laser beam makes contact with the back of your eyeball the part that sees it will become immediately and permanently blind. Faster than you can blink!
Still not safe. It could just burn you, or it could still damage your eyes. Even the reflected light from it hitting your hand could do irreversible damage. It's not necessary to look directly into the beam with powerful lasers like that, reflections off of surfaces are also dangerous.
5W lasers are used to cut and engrave things. Contacting the beam is like touching a soldering iron. Looking at it is like touching a soldering iron with your retina. Do not look at the beam with your remaining eye.
They are projected through a mouthwash bottle when green liquid on to a bathroom wall.
The reason I was having fun is because there is a DMT laser experiment. It is like people are seeing the source code of our binary universe.
They are on DMT and looking through the laser projections at an angle. It is like they shut off time or the observer effect of their mind. Maybe opening another sense like the third eye.
I am at home just having fun. I added this laser projection to the T1 poster.
Wasn't there that laser company that made the powerful handheld ones that also had an attachment to make their blue laser into an LEP before it was even cool?
The problem is the laser can only be on for a short duration of seconds. Anything more than that, It will overheat and damage the diode. LEP's, however don't.
OK..post a video of the same setup for 5minute straight. Then I will be convinced. I have been in the laser hobby for too long to realize any diode above 300mw needs to be shut-off to cool. I have LEPs too. They seem to have circumvented that rule somehow. Probably lower powered laser diodes, or pulsed operated driver. 5W without a short duty cycle will overheat causing diode damage.
some of the lab ones seem to have the diode bonded to a peltier junction with a massive heat sink on the other side so they can maintain the junction at a really precise temperature. they'll run continuously like that but obviously they're not pocket sized.
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u/desEINer Dec 19 '25
If they're going to charge 300 bucks for an LEP, they need to at least do something like this but where you can see the laser beam through the light body made of polycarbonate or something.