TK's Emisar D4 review

Does the XP-G2 D3 still have a purple corona at 600 to 1000 lumens?

Most of my usage would be around 600 and maybe bumped up to 1000 lumens.

Yes, it has the purple corona all the time. Regardless of output level.

Oh man.

What are the tint snobs that prefer the rosy 4000K to 5000k swapping these out with?

BTW, tint snob is a compliment. :+1:

If you want rosy I’d say 219b. But I still haven’t tried my 3D with frosted optics yet maybe it’ll make the tint better.

Thanks.219b be able to handle the high current of this driver?

It shouldn’t be a problem. But the output would be much lower than it would with 219c. Hopefully more knowledgeable members can chime in here.

The 219B will work but may not really like the heat that this light produces. The Vf is just as low as the 219C so it draws just as much current (15+amps), and with lots of extra heat stress because of the small host. I’d say 219C is the safer bet.

The N319 has a slightly warm tint, nice round beam with few artifacts (kinda have to spin it around looking at a white wall or ceiling to see the standard quad optic stuff)

At lower levels the overall tint is nice, there’s that off color hot spot when cranked up but it’s not much of a big deal when using it especially outdoors. It’s nice to have the cooler running light, 4 219 C’s on a 20700 is pretty intense. It’s noticeable how much longer it takes to really start heating up, so the 319 has merit in the big picture.

Picture from a previous post :

D4 Nichia 219C 4000K CRI92 (left) X5 Nichia 219C 5000K (right)

I use to love the 5000K tint, but now the Nichia 219C 4000K tint looks more neutral to me.

That’s what I want 219c 4000K. Looks great!

Words of Wisdom…
……within a relatively short period of tests with my experimental D4 (with Nichia 219b sw40 9050 - 93 CRI)
one of the leads to the stock MCPCB easily managed to relieve itself.

I assume you are going to buy from Mountain Electronics LLC ? I am sure he can make one for you, either reflow on the Noctigon MCPCB or on his own MTN Quad MCPCB, try and send him a PM he is RMM on this forum.

I don’t think that the 219b has anything to do with that. Even my XP-G2 5D did the exact same thing.

Yes, the 219B makes exact the same amount of heat as the 219C, so the ’ unsoldering capability’ should not be different.
The difference is that at 4A per led, the 219C is still quite happy (max is at 6.5A) while the 219B is right at its maximum output, and this is measured with the led extremely well heatsinked, which is not happening in the small D4.

Quite worrying btw that you guys managed to get the leads unsoldered. You did nothing to circumvent the thermal management when this happened?

Good question, I only managed to do that in a Convoy M1 quad before soldering the MCPCB to the spacer.

I don’t think there is anything to worry about, yet. I’m pretty sure that mine did that because I used too much heat when changing the mcpcb as the gold plating on the LED pad came loose in about 6 seconds after turn on.

Thanks for the heads up. I just emailed him.

I love the 219b, the 4000k may be my No1 fav of the nichias. In fact most of my nichias are 219b’s , still i have a good few 219c’s in 4000k and 5000k flavours. The 219c 5000k in the D4 i really like. Sometimes its an advantage to have a tint free beam. The slightly warmer colour temps can change lighter colours, be them whites,creams etc . The 219c 5000k keeps colours accurate to my eyes, without any exaggeration/pop!(all subjective though).

At night, tired eyes, a little warmer beam is welcomed. But when i am wanting accurate colours, maybe cables or for pictures, the 219c comes out above the 219b 4000k for me personally. Again subjective, no rights or wrongs………………just depends on the application for my preference.

:slight_smile:

What, me Worry?

If I was worried, I would have already taken RMM up on his offer to reflash the beta lot of presale V1 lights.
Since they were designed more like dragsters than street rods, I am thinking of keeping one of the two as stock.
The third D4 was purchased with the TK UI already installed.

No changes were made in thermal management, but both the stock 219c, and swapped 219b models are still V1 lights.
What we most likely have is a difference in hardness of solder, combined with quality of soldering iron/skills……LOL.

Ah, those are V1 ones, before the thermal management was finetuned.

A geographical question: there is no piece of Brazil east of Greenland, right?