When will BLF bring out their own Headlamp????

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Agro
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zak.wilson wrote:
Agro wrote:
Cheap XHP70.2 headlamp? $70? Cheap XHP70.2 flashlight? I own a $45 quad cell, a smaller light would cost less.

No, it would not. Not necessarily, anyway. Sure, it’s less metal for the body, but a four-cell light can use a buck driver with large components. A single-cell XHP70.2 light must use a boost driver with small, high-performance components. We see an example of this in the new mtnelectronics 17mm boost driver: it costs $25.


Materials + machining + battery carrier construction + shipping. My light (MT07S) uses boost driver, but it’s indeed not space-limited.

You got your point, indeed driver on such lamp must be much more expensive.

But I did 2 calculations:
1. MT07S + MTN boost driver = $70. Remove the stock driver and the differences on materials + machining + battery carrier construction + shipping. Add a headband. A deal as good as the HKL one could be significantly below $70.
2. Host $15 + driver $25 + LED $10 + $2 headband = $52.

They make me believe that there’s a space to offer cheaper single cell 18650 lights. Headlights included.

Agro
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BurningPlayd0h wrote:
From my understanding 50 vs 50.2 and 70 vs 70.2 is just the gaps between the different quadrants of the emitter filled in, but also bad tint and shift because of that? Also frosted/diffused optice would solve the issue of seeing those lines in the beam pattern on the original non-.2 versions right?

No, they are entirely different construction. So called “flip-chip”.
Read this, it’s about another LED but the points are the same.
Enderman
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BurningPlayd0h wrote:
From my understanding 50 vs 50.2 and 70 vs 70.2 is just the gaps between the different quadrants of the emitter filled in, but also bad tint and shift because of that? Also frosted/diffused optice would solve the issue of seeing those lines in the beam pattern on the original non-.2 versions right?

Higher efficiency, more output, less power draw, less heat, better thermal resistance, higher power handling, etc.
Agro
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I did some more thinking and calculations on the lightweight, cheap, efficient variant that I’d like to see.

Triple Samsung LH351D would offer very good efficiency per dollar. Would be very floody. Which is good for some, but definitely not for all. Another emitter choice would be easy with the standard XP footprint though.

With CRI70 5000k, 1000 lm OTF achievable at about 2.1A. Vf is 2.92 then, slightly too high for a buck driver but not terrible. In lower modes it’s going to be a bit better.
About 150 lm/W at 1000 lm OTF.
At 250 lm OTF it should exceed 200 lm/W.

Shouldn’t cost more than FW3A.

Going with quad (and preferably 22 mm TIR like Manker) would add some cost, weight and size. But would give the same 1000 lm with 2A. Vf drops down to 2.84 for a bit longer regulation, efficiency goes up to about 165 lm/W.
Same 200 lm/W at about 340 lm OTF.

CRI90 5000k causes 17% output and efficiency loss. Warmer is less efficient still.

ADDED:
XHP70.2 P2 would do roughly 175 lm/W at 1000 lm. That’s 2 hours on a single cell. And 200 lm/W at 450 lm. And may exceed 210 lm/W at lower modes.
So it seems better, but costlier. The cost difference may not be very bad with a low-power driver though. Very floody as well and fixing that would be harder than with LH351D.

zak.wilson
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Agro wrote:
My light (MT07S) uses boost driver, but it’s indeed not space-limited.

The MT07S uses a 4S battery configuration, a 6V emitter, and a buck driver.

Ceilingbounce – flashlight testing and runtime graphs for Android

Agro
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zak.wilson wrote:
Agro wrote:
My light (MT07S) uses boost driver, but it’s indeed not space-limited.

The MT07S uses a 4S battery configuration, a 6V emitter, and a buck driver.


Seems I don’t have a good day…
I stand corrected, thank you for keeping me straight. That error doesn’t seem to affect the other things that I wrote in that post though.
apt323
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If you build/design it they will come. Just like the lantern!

I really like headlamps but I just use a head strap and put one of my other lights in it, usually C8 size. That setup works really well.

Maybe something in a small box size type setup, that would be cool maybe.

I am interested in two depending on price can you please put me on the list………. lol Big Smile

Dirt
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In for a headlamp! 3500k option, xhp50.2, ramping, yes pls!!!

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apt323 wrote:
If you build/design it they will come. Just like the lantern!

I really like headlamps but I just use a head strap and put one of my other lights in it, usually C8 size. That setup works really well.

Maybe something in a small box size type setup, that would be cool maybe.

I am interested in two depending on price can you please put me on the list………. lol Big Smile


C8 size!? On your head!? Shocked

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
-Ayn Rand

apt323
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DavidEF wrote:
apt323 wrote:
If you build/design it they will come. Just like the lantern!

I really like headlamps but I just use a head strap and put one of my other lights in it, usually C8 size. That setup works really well.

Maybe something in a small box size type setup, that would be cool maybe.

I am interested in two depending on price can you please put me on the list………. lol Big Smile


C8 size!? On your head!? Shocked

I have a headbands with a BLF D80, and a BLF X6 (I think that’s the model) which is nearly always on them. I use it for just about everything like grilling at night, walking the area around my house, camping, hunting, and all kinds of things like that.

gravelmonkey
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Would love a high CRI, ‘floody spot beam’, L or T format 18650 with ramping UI.

An optional remote battery pack which used a dummy 18650 inside the body as the contacts with a wire through the tailcap to a 4P 18650 pack would be awesome.

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osb40000 wrote:
huey18 wrote:
Since we are just throwing out ideas, I hope we can see a product similar to the Kogalla RA light.

I like the idea of a led light strip that can be be powered by a battery, hopefully a single 18650, because most led strips I came across requires a 12V source.

The 3 main things I like about this product:
1. you can attach the straplight to the backpack strap or sternum strap
2. being able to store the most of weight in your bag (ie battery)
3. the multiple leds can cover a wider area

Some potential improvements:
1. The UI
2. modular?
3. more minimalistic (too many magnets and is bulky)

This could actually be really cool. I’d love something that attaches to my sternum strap or belt properly.

Something like this could be worn on sternum or arm or leg or strapped to a pack or…?

Great idea!

nquinn
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What I’d like to see if someone ever makes one:

- As light as possible. The skilhunt H03 is only 44g for an 18650. By rough surface area comparisons an AA body should be around 30g or so (1oz). With a battery goal would be around 2oz.
- 14500/AA powered
- Focus on very long runtimes for travel, particularly at modest levels like: 1, 30, 50 lumens.
- Not sure best way to do it, but would love to have flood and throw separately. Like an XM-L2 for flood and XP-L HI or XP-G2/G3 for throw.
- Headband should not have the third annoying top piece
- Under $30

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