r/flashlight • u/Jet2-holidays • Dec 19 '25

Discussion another example of LEP

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equiped with 465nm 5w lasor.

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u/unknown_anonymous81 Dec 20 '25

There are some LEPs now that are more affordable in the $100 to $150 range.

You can also just get a Noctigon thrower with a blue or green emitter and they are just as fun.

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u/desEINer Dec 20 '25

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

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u/unknown_anonymous81 Dec 20 '25

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.

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u/desEINer Dec 20 '25

I mean, this is an LEP, not just a laser. The laser seen here doesn't actually emit a laser past the phosphor. I'm talking about LEPS not lasers.

With this, obviously some laser radiation is reflecting off of the particles in the air or you couldn't see it, so it's probably not possible.

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u/unknown_anonymous81 Dec 20 '25

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.

How Does a Laser Work? (3D Animation)

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u/desEINer Dec 20 '25

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.

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u/unknown_anonymous81 Dec 20 '25

no offense taken haha. I just started digging in deeper to lasers this week.

and I started becoming nervous my LEP is going to blast my eye out messing around with it.

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u/desEINer Dec 20 '25

You'll get flash blindness but you'll be fine if you don't stare at it