HDS Systems #23

[thermal guy]

Do you have accurate measurements? Somehow a bit too much, mine did not heat up more than 42 degrees Celsius. Could you measure on the black part of the lantern? Shiny surfaces sometimes give incorrect results. Can wrap it with paper tape, which is used to insulate windows. Paper has a higher emissivity than polished steel. I once tried to measure the temperature of a titanium polished lantern, the pyrometer gave me different results until I wrapped it with tape

beat you to it😂😂

 

[thermal guy]

Also he's measuring in F

 

[desert.snake]

beat you to it😂😂

For a couple of seconds, you are still thermal)) I mean, heat is your element

Ah, then definitely because of the brilliance, it's only 12 degrees Celsius

 

[ilikeguns40]

I measured all areas of the light including black parts, bezel, reflector, and came up within 1 or 2 degrees difference

 

[thermal guy]

For a couple of seconds, you are still thermal))

Ah, then definitely because of the brilliance, it's only 12 degrees Celsius

We deal with this problem everyday at my work when using IR. They can be tricky.

 

[thermal guy]

I measured all areas of the light including black parts, bezel, reflector, and came up within 1 or 2 degrees difference

I measured all areas of the light including black parts, bezel, reflector, and came up within 1 or 2 degrees difference

Do you have the step down option on? Or whatever it's called.

 

[ilikeguns40]

Step down option is not on

 

[thermal guy]

Step down option is not on

👍🏻

 

[ilikeguns40]

It was fairly cool while I was taking these temps, so in hot weather the temp will obviously increase. Basically these lights do not get hot at all. I've ran in for long periods of time in my conditioned house and it got a little warm, but no warmer than just holding a piece of metal in your hands for a long period of time and reading that temp

 

[cerbie]

Yes, I agree fully with you that in general you don't need more than 100 lumens for any EDC task. (Though, this does also depend on the individual and what their "EDC tasks" really are.

For example, if you are a LEO who carries a firearm while you are off-duty (like me), the HDS "tactical" flashlight that is categorized as such for a LEO to carry on duty or off on HDS' website, still has a max output of only 250-325ish lumens, yes it is nice that it turns on at max output because that's what you would want in that type of scenario, however 300 lumens is still not good enough for a light in that role (not in modern times at least). Back in the day (15-20 years ago or so) guys used to get away with 50-200 lumen range. But today that's unnecessary, why give yourself that disadvantage? Other companies are more appealing for this role at least, such as malkoff and modlite.

For example modlite offers a small 18350 handheld option, with around 1300 lumens and 54k CD. After studying some charts/tests done, the light sustains roughly 1,050 lumens for the entire first 5 minutes the light is on, then drops down to roughly 700 lumens for the following 2 minutes and then finally at about the 7/8 minute mark finds its place at about 435(ish) lumens for the remainder of the cells life. With that said, usually a "tactical" type of encounter off duty specifically will generally be finished well within that 5 minute mark. So instead of 250 we just 4x's the amount of light we have to work with.

With that said, for years I've wanted an HDS, contemplated grabbing one just for an EDC role/task but I really cant see myself carrying (2) lights, 1 dedicated EDC and 1 dedicated "tactical". Just too much space and heft and I know I'd end up just leaving the HDS at home.

Granted I've pulled out the modlite countless times for general EDC tasks including changing my vehicles tire, and REALLY wished I had another light with me with a lower mode. Hence why I came back to see if HDS finally bumped up their numbers at all. Unfortunately they didn't. So I guess my dream of owning one will need to continue to be put in the back burner! -- With that said, I think the HDS (especially with the rotary option would be an amazing choice for purely an EDC light without the gun-fighting aspect thrown in the mix).

Anyway, take care and thanks for chiming in!...

Love talking lights and the philosophy behind their use!

A BOSS might work, instead - though IIRC it's a power switch light, rather than e-switch, which could be annoying for special mode access (like beacon) - and a few might still be in stock (sure looks it). They're usually even harder to get in a decent amount of time than HDSes. I'm not sure what the candela numbers are like, but the total wall of light from a 519A under a 10507 should be pretty impressive. I don't see output listed, right handy, but based on the older low-CRI Crees getting about 3500lm max, 2000-2500lm is probably a reasonable expectation from the 519As.

 

[Lights and Guns]

A BOSS might work, instead - though IIRC it's a power switch light, rather than e-switch, which could be annoying for special mode access (like beacon) - and a few might still be in stock (sure looks it). They're usually even harder to get in a decent amount of time than HDSes. I'm not sure what the candela numbers are like, but the total wall of light from a 519A under a 10507 should be pretty impressive. I don't see output listed, right handy, but based on the older low-CRI Crees getting about 3500lm max, 2000-2500lm is probably a reasonable expectation from the 519As.

I appreciate the reply, just took a look at what was in stock. I've honestly never been a fan of the aesthetics of the BOSS lights at all and because of that alone I'd not be willing to spend that type of money on it. Also, way too much output on high for that fuel source, it'd prob step down SUPER SUPER fast, I highly doubt it would have any meaningful candela with it on top of that, probably just a wall of light. Not super ideal either. I like a mixture of Output and candela but an output that makes sense. I think the 1,000Lm mark is right around where you can get about 4 1/2 ish minutes out of an 18350. But 2000+? No clue, but I'd imagine sub 45 seconds?

 

[neco]

Seems like an HDS could be turned on maximum for as long as the battery lasts, many many times. Even when it is several years old, it is safe to think that the emitter has not been cooked with hot use and will continue to be reliable for cave use (or other needs where reliability is more important than juicing the LED and getting eventual burn out)?

Taken from HDS FAQ:

How long will the LED last?

The LED in your flashlight will last for 6,000 to 18,000 battery changes depending on what brightness settings you are using. In practical terms, the LED in your flashlight will never need replacing.
The life of an LED depends on a number of factors. The most important of these are heat and current. Our flashlights have a direct thermal path from the LED to the exterior of the flashlight to remove any heat from the LED. Then we use a sophisticated regulation technique to manage the heat and current in your flashlight which will prevent premature aging that causes reduced lumens output and protects the LED from catastrophic failure.

 

[neco]

Additionally KITROBASKIN, HDS does not overdrive their LED's and the heat management is the best I've tried while comparing to other lights. I expect my HDS lights to easily outlast me. Not that I'm old so I expect them to last a very long time…

 

[KITROBASKIN]

If HDS flashlights are first and foremost for cave exploration, extended throw is really not needed unless you are fortunate enough to be in a truly voluminous cavern.

Really, I've been using a Fraz Labs qt 18650 and I'll tell you it is not a screamer; maybe similar to HDS. (But I do have a hot burning compact thrower with me because our terrain benefits from its few seconds of occasional use)

 

[kerneldrop]

They said before the output is kept lower due to the max 1.5 amp cr123 battery.

 

[desert.snake]

We just need to wait a bit for the output of 3V LED with 1000 lm / W and everything will be fine

 

[slumber]

Henry has minimum runtime requirements. I believe that is one of the major reasons he doesn't build hot rod lights along with all the other benefits of not driving them harder.

 

[Hogokansatsukan]

1000 lumens isn't that big a step from 325 from what your eyes perceive. While it sounds like 3X the output and technically is, your eyes will NOT perceive it as being that. One of the reasons we always hear folks who buy their first HDS say "it's a lot brighter than I thought it would be." The other reason is, of course, we don't fib about the output.
From the FAQ
What is the logarithmic nature of my eyes?

Your eyes respond to light in a logarithmic way. That means they require a significant percentage change in light output for your eyes to notice a small but visible change in brightness. A 50% (1.5x) increase or 33% (0.67x) decrease will produce a small but visible change in brightness. An increase or decrease of half that - 25% (1.25x) and 20% (0.80x) respectively - will probably not be noticed.
You are probably already familiar with logarithmic scales in other areas of your life. For instance, earthquakes are measured using the logarithmic Richter scale. Sound is measured in logarithmic decibels. If you are a photographer, you are familier with the logarithmic f-stops and the logarithmic progression of shutter speeds. Even the musical notes in an equal temperament scale are logarithmically spaced. Logarithmic scales make it much easier to represent very large variations from tiny to huge because the scale represents a progression of ratios instead of a progression of linear units. The perception of most physical phenomena by our bodies - sight, sound and touch - are essentially logarithmic. It is difficult for us to perceive small percentage changes.
Many people are surprised to find out that going from 0.17 to 0.25 lumens looks the same as going from 167 to 250 lumens. From your eye's perspective, the step size is the same in both cases - a small but visible change. Notice that in the first case we only increased by 0.08 lumens while in the second case we increased by 83 lumens - a difference of 3 orders of magnitude.
You might be surprised to find out that you need a 10x increase in light to produce what most people consider to be a doubling in the amount of light. Again, this is due to the logarithmic nature of your eyes.

 

[tech25]

One of the reasons we always hear folks who buy their first HDS say "it's a lot brighter than I thought it would be."

I'm one of those.

 

[ilikeguns40]

Plenty bright for my needs considering 50 lumens and under is 90% of my usage