Emisar D1sV2 respectively Noctigon K1

:cowboy_hat_face: Following

ZozzV6 beamshots are becoming more reference-like :partying_face:

Anyway, I get also very disturbed of the backscatter of cooler white emitters. My limit is around 4800K - and then, it HAS to be high CRI, because with lower CRI, there is more ‘angry blue’ in the LED output, which will increase backscattering noticeably. This is why I raised word for the 4500K 90 CRI variant of XHP35 HI (and of course 2700K and 3500K XHP35 HI 90 CRI would be also very welcomed).

And if someone would happen to make an E21A 2000K 95CRI thrower with over 150k candela, I would buy it in the same microsecond :smiling_imp:

Hahaha so much output it made the trees think it was summer!

Any updates on the Noctigon K1? Something? Anything? I need my fix! I’m going to go play with my Astrolux mini lol lol. :smiley:

These beamshots are very good, but they were not taken the same day, so temperature and humidity could have been very different. To really compare backscatter, we would need beamshots taken within minutes of each other.

Oh. Boy. This looks amazing.

Exactly, I would actually like those photos to be removed from this topic as putting them next to each other in this context might cause some strange opinions to form. I’m sure if pics were taken on the same day difference would not be as great.

Taking them with a grain of salt and being aware conditions were not the same is better than having nothing at all to look at.

In lieu of anyone having back-to-back comparisons this is all we have, and in my experience it matches reality pretty well.

The fact that blue light scatters in air more than yellow light isn’t conjecture. It is an actual, measurable property of light.

Quoted my message above for reference. If a light were shining in actually clear air with no particles in it then cool light will scatter more. But my guess is that there is usually a significant particle density in the air whether it be fog particles or dust. Even if it doesn’t look very hazy there are a lot of particles. Scattering off of these relatively large particles is probably going to be dominant, and this type of scattering is not wavelength dependent.

Below are some pictures I just took. On the left is a convoy S2+ with smooth reflector and 2mm^2 white flat. On the right is another S2+ with smooth reflector but with a warm dedomed XPL. I adjusted their powers so their beam intensities were equal. The second photo is just meant to show the color difference. I lowered the powers to arbitrary values for the second photo.

It was not foggy out, but in the beam you can easily see very small water particles floating around. It is a 5s exposure. I think the amount of scattered light looks the same. So, again, if the air is actually very very clear the cool light will scatter more, but with any particles in the air the light will scatter a lot more, and it will be the same for warm or cool light.

Thanks for the explanation EasyB

We have a lot of road construction in the area so there are always dust particles in the air, sometimes so much as to almost look like snow. Which beam tint cuts dirt best?

And I guess my high quality high resolution back to back GT pictures were a waste of my time. Another one of many reasons I seldom bother to log in anymore.


While your GT pictures were valuable to show the beam was not diminished too much, they were not directly addressing the issue being discussed which was how much the scattered light from the beam diminishes the users eyesight.

Regarding the best light for dirt: if the dirt is, for example, very red, a light with less red in it might scatter a bit less.

The great thing about Hank’s lights is that the emitters are offered in a wide variety of color temperatures, so most anybody can get one that fits their preference!

For Raleigh scattering to have any effect the particles involved would have to be no bigger than 40nm, but typical fog droplets are in the 10-15um range, so Raleigh scattering is not relevant and Mie scattering is. Atmospheric dust, however, ranges from about 1nm to 30um, so both Raleigh scattering and Mie scattering are valid models, though the Mie scattering will be a greater contributor.

That said, your eyes are your best tool to evaluate how a particular flashlight works for you. :sunglasses:

I wish you could offer the old style switch cover. The white, semi-translucent ones just aren’t as elegant in my opinion, we all remember them from the cheapest flashlights. Old D1/D1S had it right.

I think this is pretty valid, and that those are very useful beamshots. Your comparison with the GTs (which IIRC are even regulated drivers) shows a marked difference, and leaves two possible explanations that I can think of: the CW XHP35.HI is higher binned, because CW LEDs come in higher bins, or the CW penetrates the medium (air, water vapor, and other particles included) better.

Unless someone is dealing with a very homogenous medium that reflects and/or refracts specific wavelengths more than others, your best bet is probably to just get the LED with the highest surface brightness you can find.

People need to pick the LED they want. If you like neutral throwers better, that’s fine. If you think you see your target better with neutral or warm light on it, that’s fine. If you want a high CRI thrower, that’s fine too. Color rendition has value, and that value is different to different users and use cases. And the best part is Hank will install anything he reasonably can just because he’s that awesome.

I get why some of the discussion wasn’t interested in those particular beamshots Dale, as there’s a lot of discussion about the visible, through-air beam (the lightsaber!) being “worse” with CW lights. Though from the looks of it, that just got debunked as well.

As for my $0.02, there’s nothing quite like my Z1’s pencil-beam stretching across a local reservoir and getting to see that cool white lightsabre-effect visible out to hundreds of meters.

I am glad that the forum finally using my beamshots :smiley:
It is hard to make same conditions through a year And I can’t repeat all flashlight photos one day. Mostly because it is a lot work but otherwise a lot of them borrowed or rebuilt since or sold.
But now I see it is worth the effort to have that collection. I am also late with photos but Soon I will add a lot of lights to the tables.

Really looking forward to this one!!