KC1 keychain light is available now

Would the copper version last longer on turbo compared to the standard aluminium option? :student:

If i’ve learned anything from The Fast and The Furious it’s that you can only shoot so much NOS into a Civic.

I dont have my copper FW3A anymore but I recall it didnt even last twice as long on Turbo. I think you do get a few more “shots” out of it until the light is totally saturated though. I think it also maintained like maybe 15-20% higher sustained brightness too. One quirk is copper lights sometimes “feel” hotter on the outside even if the electronics run slightly cooler. $.02 YMMV

really? u didnt learn any family values? lolol

Possibly.

My understanding is that by volume copper can hold approximately 60% more heat than aluminum. This means the copper takes longer to saturate with heat so in theory it might hold more before it overheats.

But on the other hand, copper also conducts heat far better than aluminum. This can be both good and bad when it comes to turbo modes.

  • It is good because the better heat conduction helps move heat away from the emitters and other electronics helping them to stay cool.
  • However, the temperature sensor that controls the thermal rampdown is located in the MCU on the driver board. A copper head may mean heat conducts from the shelf back to the driver board faster than an aluminum head. This could result in the light ramping down as fast or even faster than the aluminum version.
  • You can mostly override thermal rampdown with firmware settings. However, copper again shows a disadvantage. It conducts heat so well, instead of just the head of the light being too hot to touch, the body tube itself might become too hot to touch. The result is the limiting factor in turbo output changes from “protecting the electronics” to “protecting your hand”. It doesn’t necessarily help if the light is able to run on turbo without damaging the electronics, but you need an oven mitt to actually touch the light without burning yourself (and possibly risk the battery overheating and exploding).

Another thing: Copper conducts heat better and has more thermal capacity than aluminum. But you still need to get the heat out of the light. There are three mechanisms that makes this happen:

  • Emissivity - the hot metal emits the heat as infrared radiation. Shiny copper or aluminum has low emissivity (bad). Dark anodized aluminum and tarnished copper has high emissivity (good).
  • Convection - air circulating around the exposed pieces of metal takes away heat from the light.
  • Conduction - your hand absorbs some heat from the light.

I think this means that I need to get a copper version to compare with my first aluminum D4V2 that I ordered last week. :money_mouth_face:

Is D4V2 Ti no longer available? The page does not work.

Appears to still be available here - https://www.noctigon.com/index.php?route=product/product&product_id=56

I just noticed that there are different colors of LEDs available for the backlight on the switch. Does anybody have any pics? Would love to see the red…

The website appears to be down - https://intl-outdoor.com

SUSPENDED

This website has been suspended.

Please contact the technical support department.

https://www.noctigon.com is still up.

The website seems ok to me.

Working fine for me, although I did have that happen to me about a week ago.

Wondering if it’s blocked in UK or you’re cached??

I seem to get that every now and then. Along with lights disappearing from the LED Flashlights page and coming back a day later :wink:

https://www.reddit.com/r/flashlight/comments/hzep4o/d4v2_custom_button_colors/

They might look like this?

works for me too…maybe hank banned you :wink:

Last time the site was suspended for others it worked for me on my phone but I also got the “Suspended” message when I tried a different Internet connection. It seems work fine on different connections now though…

What’s the best setup for the copper d4v2? I have the yellow d4v2 with 4500k and raised button edge and silver bezel. Love it.

Does the copper also have the same aux led options?

Any pics of the button light?

dude… i couldn’t relate more! I just bought my first d4v2 in brass with osram w2… cost me $100. that was 3 weeks ago and now im probably buying the copper. and if Hank ever comes out with kr4 brass and copper i’m definitely buying one of those. And i am buying the k1 in green body. and i already have 5 emisar / noctigon lights. Hank is KILLING ME

^ Hank, PLEASE do KR4 in copper. Please. KR4 is my favorite light i own of many. Not that i need another light but id buy it.

I just snagged a 5th D18 because…well, deep red emitters.

Hank’s business is a masterwork of healthy addiction creation.