Noctigon K1 info / review

bmengineer · 2019-11-28T14:01:51.000Z

Available now with the Osram LED
https://intl-outdoor.com/k1-long-range-led-flashlight.html

Hank_Wang · 2019-11-28T14:04:17.000Z

trakcon:

P33:

Any estimation on how it would throw with XP-L HI or SST-20?

I’m really interested in knowing this.

There will be XP-L HI, SST-20 (good beam) options in the future,
for now, there are only W1, W2 options.

Souichirou · 2019-11-28T14:05:16.000Z

Order placed ! =D

Hikelite · 2019-11-28T14:09:22.000Z

twisted raven:

The second graph doesn’t make it seem too regulated on highest output? Unless the second graph is with the warm room thermal regulation as well.

Probably with a different cell like 40T, one that has more voltage on load will be more regulated than with the 48G cell.

It is already written in the review:

“This test shows a Samsung 48G cell, which is among the weakest 21700 cells on the market. A higher-amp cell would stay flat longer.”

Yokiamy · 2019-11-28T14:31:39.000Z

Beautiful light, excellent design with tge built in USB C!

I will wait for the XHP35 version though, since it makes it a better all rounder.

Hank_Wang · 2019-11-28T14:46:29.000Z

1stein:

How many Amps it pulls in Turbo? 4? 4,5? 5?

4.9A for the W1, 7.8A for the W2.

twisted_raven · 2019-11-28T14:59:15.000Z

But doesn’t a well-implemented regulated driver keep constant regulation regardless of cell voltage and resistance? Something like a Zebralight will make a cell that’s nearing 3amps still output turbo.

The graphs look like a direct-drive graph ie following the voltage sag of the cell.

BurningPlayd0h · 2019-11-28T15:18:38.000Z

twisted raven:

But doesn’t a well-implemented regulated driver keep constant regulation regardless of cell voltage and resistance? Something like a Zebralight will make a cell that’s nearing 3amps still output turbo.

The graphs look like a direct-drive graph ie following the voltage sag of the cell.

No, you’re thinking of a boost driver which can step up the voltage from the cell. Zebralights use boost-buck drivers (which can both raise and lower voltage to maintain max efficiency), not linear.

SammysHP · 2019-11-28T15:23:10.000Z

twisted raven:

But doesn’t a well-implemented regulated driver keep constant regulation regardless of cell voltage and resistance? Something like a Zebralight will make a cell that’s nearing 3amps still output turbo.

The graphs look like a direct-drive graph ie following the voltage sag of the cell.

It’s a linear driver (that basically converts the additional voltage into heat), unlike a buck/boost driver used by ZebraLight.

twisted_raven · 2019-11-28T15:41:38.000Z

Well hopefully a cell with less resistance fairs significantly better, because that driver might as well be run of the mill fet+linear based on the graphs.

BurningPlayd0h · 2019-11-28T15:56:25.000Z

SammysHP:

twisted raven:

But doesn’t a well-implemented regulated driver keep constant regulation regardless of cell voltage and resistance? Something like a Zebralight will make a cell that’s nearing 3amps still output turbo.

The graphs look like a direct-drive graph ie following the voltage sag of the cell.

It’s a linear driver (that basically converts the additional voltage into heat), unlike a boost driver used by ZebraLight.

It’s not using linear regulators, but rather a FET + sense resistor for determining current IIRC? Like the recent Convoy drivers do.

Driver type: regulated linear FET

twisted raven:

Well hopefully a cell with less resistance fairs significantly better, because that driver might as well be run of the mill fet+linear based on the graphs.

The XHP35 HI versions will use a boost driver, as that emitter is only available in 12V.

JordanZHP · 2019-11-28T15:56:53.000Z

Hank great job! Also ToyKeeper thank you for putting your amazing UI in another light. I think the lighted switch is awesome and the light seems very high quality. Now I need to decide if I go with the Osram leds or wait for something with more lumens…

SammysHP · 2019-11-28T16:03:24.000Z

BurningPlayd0h:

It’s not using linear regulators, but rather a FET + sense resistor for determining current IIRC? Like the recent Convoy drivers do.

You can think of the FET in this case like a variable resistor that adjusts its value so that it allows a fixed current to flow. And that’s a linear regulator.

EasyB · 2019-11-28T16:04:19.000Z

Looks like a nicely designed light. Is this the first implementation of ramping FW in a constant current FET driver? It’s great that each mode is regulated, but if you don’t know the current at a given mode doesn’t that defeat some of the purpose of regulation? Like when you are out on a “mission” and want the brightest level without risking depleting your battery. For example I changed my mountain biking lights to 8x7135 drivers with simple 100–50… modes so I know I have the brightest light for a 1 or 2 hour ride.

will34 · 2019-11-28T16:24:25.000Z

Thanks for the review! Impressive thrower.

Does the W2 version use the same driver just tuned differently? I read people were direct driving this one and performed fine, so no need for a linear type driver?

drewpawlow · 2019-11-28T17:21:51.000Z

Yours isn’t broken. I get the same hole in the center at very close distances in Convoy L2, C8 and P60 builds using the CSLPM1 and CSLNM1. Not sure why it happens, guessing it has something to do with the height of the emitter. But I’m probably wrong.

noboneshotdog · 2019-11-28T17:26:47.000Z

Here are the specs from Hanks sales link.

W1 (Osram CSLNM1.TG): 900lm, Lux : 650kcd

W2 (Osram CSLPM1.TG): 1400lm, Lux: 550kcd

TMaxxJJ · 2019-11-28T17:56:25.000Z

I wish this was going to be available with the Osram at warmer (even neutral) tints. Is there any particular reason as to why the white flat isn’t or can’t be available at 4000-5000k?

TexasToasted · 2019-11-28T18:08:42.000Z

twisted raven:

The hole in the beam from such close distance isn’t from having a defective unit, that’s just how well-focused beams look at close range. Having used an Acebeam T21 and Maxtoch X Pro modified with Black Flat and White Flat 2mm accordingly, I can attest to that artifact.

The second graph doesn’t make it seem too regulated on highest output? Unless the second graph is with the warm room thermal regulation as well.

drewpawlow:

Yours isn’t broken. I get the same hole in the center at very close distances in Convoy L2, C8 and P60 builds using the CSLPM1 and CSLNM1. Not sure why it happens, guessing it has something to do with the height of the emitter. But I’m probably wrong.

She was joking. Read the last part of her post.
“This light is not meant to be used for up-close work. Because it’s a dedicated thrower, the hotspot is small and intense. It takes a few meters for the beam to collimate, and up-close it makes a donut-shaped beam. This is totally normal for throwers, but it may be unexpected for anyone who hasn’t used a long-range thrower before.”

BurningPlayd0h · 2019-11-28T18:21:57.000Z

SammysHP:

BurningPlayd0h:

It’s not using linear regulators, but rather a FET + sense resistor for determining current IIRC? Like the recent Convoy drivers do.

You can think of the FET in this case like a variable resistor that adjusts its value so that it allows a fixed current to flow. And that’s a linear regulator.

Interesting, I didn’t realize it would still burn off the excess voltage in the same way. I suppose you get the advantage of constant current instead of PWM but that has it’s downsides (like tint shift with changing current) too.

TMaxxJJ:

I wish this was going to be available with the Osram at warmer (even neutral) tints. Is there any particular reason as to why the white flat isn’t or can’t be available at 4000-5000k?

Because Osram hasn’t produced it at those tints. I doubt there is a physical/engineering reason why they can’t, as they’ve had emitters with very high luminance and 95+ CRI in warm tints.