2000k flashlight

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Photon Master
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Turns out it was user error (:

It seems like I was putting the black plastic “sleeve” in from the wrong end. I inserted it so the the “lip” is on the LED side of the 18350 tube and it’s working great. I also realized I was in muggle mode which was causing the strange behavior.

Photon Master
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lightdecay wrote:
XP-E2 Amber makes E21A 2000K R9050 look like a standard 2700K incandescent light bulb with perfect color rendering.

Beamshot: E21A 2000K R9050 vs XP-E2 Amber.

Which one do you like better? I have the 2000K but that XP-E2 Amber looks pretty sweet

lightdecay
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I like both, but I definitely prefer the E21A 2000K R9080. It just looks great.

My next goal is to try all of these amber leds, to see which one I like best:
Osram KY CSLNM1.FY [phosphor-converted]
Cree XP-E2 PC Amber [phosphor-converted]
Cree XP-E2 Amber [monochromatic]

Lightbringer
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lightdecay wrote:
XP-E2 Amber makes E21A 2000K R9050 look like a standard 2700K incandescent light bulb with perfect color rendering.

Wellp, amber is pretty much monochrome, with a cri of about 3.

A good 2000K LED will still look “amber” from being so warm, but have a much wider spectrum and higher cri.

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Lightbringer
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Photon Master wrote:
I just got the 18350’s lightbringer recommended and I’m getting some very weird behavior. I’m using the 18350 tube and middle piece

As I tighten the cap, the light will flicker really fast and then go to max brightness. The tail cap button doesn’t seem to do anything. If I tighten all the way, i get the last “background light” (I.e. steady green) and the button still doesn’t do anything

Oh, sure, blame me… Silly

Sounds odd, though. Will have to try it and see.

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Photon Master
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Lightbringer wrote:
Photon Master wrote:
I just got the 18350’s lightbringer recommended and I’m getting some very weird behavior. I’m using the 18350 tube and middle piece

As I tighten the cap, the light will flicker really fast and then go to max brightness. The tail cap button doesn’t seem to do anything. If I tighten all the way, i get the last “background light” (I.e. steady green) and the button still doesn’t do anything

Oh, sure, blame me… Silly

Sounds odd, though. Will have to try it and see.

Ha sorry it came out that way. Found the issue – I put the black tube in the wrong end. Feel like a dummy

Photon Master
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lightdecay wrote:
I like both, but I definitely prefer the E21A 2000K R9080. It just looks great.

My next goal is to try all of these amber leds, to see which one I like best:
Osram KY CSLNM1.FY [phosphor-converted]
Cree XP-E2 PC Amber [phosphor-converted]
Cree XP-E2 Amber [monochromatic]

Nice! I love this 2000K. Glad I got 4 of the 18350s because they obviously don’t last as long as the 18650s did. It started to dim and then actually turned off yesterday and the battery was at like 2.3 volts (:

lightdecay
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I also want to try the Luminus Xnova Cube 1800K 90 CRI, R9 is about 50:
http://budgetlightforum.com/node/68142

samyy
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I use this one.

adam7027
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lightdecay wrote:
I like both, but I definitely prefer the E21A 2000K R9080. It just looks great.

My next goal is to try all of these amber leds, to see which one I like best:
Osram KY CSLNM1.FY [phosphor-converted]
Cree XP-E2 PC Amber [phosphor-converted]
Cree XP-E2 Amber [monochromatic]

Phosphor converted color LEDs are kind of fun. I already have a “Pure Green” Osram, which is indeed a very good thrower, and that tint of CSLNM1 can be driven quite far. Unfortunately I looked into the specs, and found, that the yellow/amber tinted CSLMN1 output starts to flat out much sooner. For it, I guess, a 3A current driver could be perfectly fine instead of a 5A current one (thus, not going to use Turbo on my Noctigon K1 /ordered, shipped, but not yet delivered/).

Still, I am very excited to see it. The “Yellow” has almost as wide spectrum as the “Pure Green”.

If you want a complete research on this, you could include Nichia E17A as well, as I recall, there are green, yellow and red tints all of them phosphor-converted.

lightdecay
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samyy wrote:
I use this one.

Could this be the Epiled “Golden Yellow” 5050?
http://budgetlightforum.com/node/65395
samyy
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lightdecay wrote:
samyy wrote:
I use this one.
Could this be the Epiled “Golden Yellow” 5050? http://budgetlightforum.com/node/65395

I doubt it. That Juntang LED has two bond wires inside, not three.

puglife2
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Field use pix of my E21A 2000K D4v2 Cool

stephenk
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Thanks for posting the photo!

Photon Master
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puglife2 wrote:
Field use pix of my E21A 2000K D4v2 Cool

!{width:50%}https://i.imgur.com/JTE6a0A.jpg!

Wow! I have the D4V2 in 6500K and I’m tempted to gift it and replace it with a warmer color. Might be cool to try 2700K

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Photon Master wrote:
Might be cool to try 2700K

No, not cool, it would be warm, LOL, just joking around.
Still, It might depend upon how and where you will be using it and your eyes. I have an XP-L High 7A 3000k that I do not use outdoors very much because it is too warm. It is fine around a campfire or indoors, but not walking in the woods. After that experience I have been staying with 4000k and some 5000k lights. But with the other issues like CRI, etc. you might like the 2000k, these guys sure do, so let us know. You might even convince me to try it.
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Summertime when you’re swarmed by bugs outside, you’ll be wanting something in the infrared. LOL

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adam7027
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Lightbringer wrote:
Summertime when you’re swarmed by bugs outside, you’ll be wanting something in the infrared. LOL

Yep. I have a Skilhunt H03 with 2000K E21A, and I can confirm, I receive half amount of incoming insects compared to my other headlamps Smile

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Lightbringer wrote:
Summertime when you’re swarmed by bugs outside, you’ll be wanting something in the infrared. LOL

So this is actually a tough call. While most flying insects can not see into the red spectrum, some species of moths can see into the red spectrum and seem to be attracted to red light. I really don’t understand why people hate moths so much that they use UV bug zappers, which generally mostly kill moths and nothing that matters to us. Horrible things, bug zappers. They do nothing to help us. Moths are kind of cool, nighttime butterflies, and some of the big ones are truly beautiful. I sort of wish we could all let them be. So the only flying biting insects that matter to us (not counting noseeums, which are just annoying and don’t leave welts) are mosquitos, which cause all kinds of problems beyond an inchy welt, such as spreading Zika virus, West Nile virus, Chikungunya virus, dengue, malaria and whatnot. Mosquitos can see red, but I would not say they are necessarily attracted to red… but they are actually attracted to infrared; they see it coming off our skin and know there is a meal there. So, really, the only solution is lower light levels from yellow to red, the point being that lower light levels don’t attract as many bugs from as wide an area, and using light shifted to that spectrum, most bugs aren’t attracted to it. But really… we just don’t care about those bugs. We really need to somehow end to extinction, wipe off the face of the earth, all of the biting mosquitos, and leave the non-biting mosquito species be. The only thing that works against mosquitos that you can take camping is repellent on the skin with DEET, horrible, but it does work. But that just repels and prevents you from getting bit when properly applied. The one thing that works the best against mosquitos, lowers the population in any area massively by killing them, is the right mosquito pheromones with a CO2 trap, and that works pretty good, but you hardly ever see them used. There are projects working with AI targeting low yield IR lasers, some that burn the wings off them, but this is not only kind of morbid, there is a real risk of, you know, blinding people that happen to walk into the laser killing field. The lasers fire far faster than the blinking reflex and can do some damage in that short time period.

Lightbringer
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That laser-thingy sounds like something I’d try building…

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nocturne
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Lightbringer wrote:
That laser-thingy sounds like something I’d try building…

This is one of the mosquito laser projects, the original I believe

https://en.wikipedia.org/wiki/Mosquito_laser

https://www.youtube.com/watch?v=BKm8FolQ7jw


but I just read about a new project (oops. same group, more advanced detection, tracking & striking)

https://www.nature.com/articles/s41598-020-71824-y

Photon Master
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That’s so cool. I can tell you it doesn’t take long to kill a mosquito with a 6 watt blue laser. If one of those little guys is zooming around my room I put on good safety goggles and blast it

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Hmm, if they’re “good safety goggles”, how do you see the beam to target the little f’ers? Use The Force™?

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Photon Master
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Haha well you can see a very dim dot. I turn the lights off in the room and then crank my Nitecore headlamp to turbo. I can’t imagine how ridiculous it looks

Photon Master
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I like to think it’s a fairly humane way of ending the mosquito’s existence.

Photon Master
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Just received my RoxyVon Aurora A9 Copper w/ the Nichia 219C LED with 4500K neutral white tint and 90+ CRI. When I fired it up in the basement, it was “whiter” than I expected until I compared it side-by-side with a 6500K light. Looking forward to trying it outside tonight to see what the high CRI thing is all about!

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