TK's Emisar D4 review

[tinowrx]

@WalkIntoTheLight

@tinowrx

i ordered on the 3rd of December before i went on holiday. i came back about a fortnight later and there it was waiting for me on the kitchen table

You need to ask the postman for your house key back. Did he eat your food, too?

hahahahah maybe my missus give him a cup of tea too!!!

[mortuus]

@FlashIight

@mortuus

ok i got my tracking number in the mail now, hurray!!

Is that from Neal or from Hank?

Hank.

[Nev]

Hey Hank , forget about making the D4 in girly coulours , get on wiv the D7

[Coscar]

@FlashIight

@mortuus

ok i got my tracking number in the mail now, hurray!!

Is that from Neal or from Hank?

I think Neal is still taking orders but he’s not providing support or replying to emails if you have a problem :confounded:

[FlashIight]

@Coscar

I think Neal is still taking orders but he’s not providing support or replying to emails if you have a problem :confounded:

That does seem to be the case. Have you made any progress with your PayPal dispute?

[ToyKeeper]

@Nev

Hey Hank , forget about making the D4 in girly coulours , get on wiv the D7

What’s wrong with girly colors?

About the D7, he’s working on it. The development takes a while though, and he prefers not to say much about it until it’s nearly ready to buy.

[JakeDjanitor]

[quote=WalkIntoTheLight]

@ToyKeeper

@JakeDjanitor

It costs more but if it will last a few years it’s worth it[/quot

A few years is probably a low estimate. These things are usually replaced because something new and exciting came out, not because the old one stopped working. I mean, unless you put a light through a lot of abuse and damage the host, or if there’s something actually wrong with the electronics. It’s quite possible that our flashlights will be around longer than we are.

Yes, that is true for the vast majority of lights. But I think he was referring to the huge overdriving of the Nichia emitters that the D4 does (compared to only the big overdriving of the Cree XPL-HI emitters).

Given how much over-spec the Nichia emitters are being driven, they probably will not last anywhere near the 50,000 hours (or whatever their lifetime-to-70%-brightness is).

Of course, if you don’t use turbo very much, they’ll probably last a very long time. But, what’s the point of getting a D4 if you’re not going to abuse the turbo a lot? :smiling_imp:

I know that I will be hitting turbo a lot… It’s a hot rod!
But I also will use lower levels a lot too. It’s amazing how often you use a light. It’s like a leatherman or a watch.
I wonder how the threads will hold up to changing batteries a few times a week haha

[Coscar]

@FlashIight

@Coscar

I think Neal is still taking orders but he’s not providing support or replying to emails if you have a problem :confounded:

That does seem to be the case. Have you made any progress with your PayPal dispute?

Nope……… still waiting for Neal’s response to PP……. the silence is deafening….

[Jerommel]

@Flashy Mike

@Jerommel

Ther 219C has a much lower Vf than the XP-G2 or XP-L HI, so there’s a lot of current pushed through them, more than with the XP-G2 or XP-L HI.
3500 lumen : 4 = 875 lumen from each 219C, which is probably some 3½ to 4 Amperes for each 219C, which is way beyond the maximum rated current.
I can imagine a freshly charged VTC5A could kill them before the rise in temperature is recognised by the driver.

I had the less efficient CRI92 Nichia 219C from Kaidomain in my D4 for some months and used turbo pretty often. Current up to 20 Amps with high drain cell, got hot very fast. No damage to the LEDs, but used own driver firmware with fast thermal response, don`t know if its different with stock firmware.

That’s 5 Amperes for each 219C…
Totally pointless…

[khas]

@Jerommel

@Flashy Mike

@Jerommel

Ther 219C has a much lower Vf than the XP-G2 or XP-L HI, so there’s a lot of current pushed through them, more than with the XP-G2 or XP-L HI.
3500 lumen : 4 = 875 lumen from each 219C, which is probably some 3½ to 4 Amperes for each 219C, which is way beyond the maximum rated current.
I can imagine a freshly charged VTC5A could kill them before the rise in temperature is recognised by the driver.

I had the less efficient CRI92 Nichia 219C from Kaidomain in my D4 for some months and used turbo pretty often. Current up to 20 Amps with high drain cell, got hot very fast. No damage to the LEDs, but used own driver firmware with fast thermal response, don`t know if its different with stock firmware.

That’s 5 Amperes for each 219C…
Totally pointless…

Maybe it’s better to use Luxeon V’s they have a max. drive of 5.0 Amps

[Nev]

@ToyKeeper

@Nev

Hey Hank , forget about making the D4 in girly coulours , get on wiv the D7

What’s wrong with girly colors?

About the D7, he’s working on it. The development takes a while though, and he prefers not to say much about it until it’s nearly ready to buy.

Nothing, if that’s what you like , not for me though because I’m boring , I like black.

[Charga]

Hhm, how about the D7; do we have some more insider Infos here :exclamation: :question:

[Hikelite]

@khas

@Jerommel

@Flashy Mike

@Jerommel

Ther 219C has a much lower Vf than the XP-G2 or XP-L HI, so there’s a lot of current pushed through them, more than with the XP-G2 or XP-L HI.
3500 lumen : 4 = 875 lumen from each 219C, which is probably some 3½ to 4 Amperes for each 219C, which is way beyond the maximum rated current.
I can imagine a freshly charged VTC5A could kill them before the rise in temperature is recognised by the driver.

I had the less efficient CRI92 Nichia 219C from Kaidomain in my D4 for some months and used turbo pretty often. Current up to 20 Amps with high drain cell, got hot very fast. No damage to the LEDs, but used own driver firmware with fast thermal response, don`t know if its different with stock firmware.

That’s 5 Amperes for each 219C…
Totally pointless…

Maybe it’s better to use Luxeon V’s they have a max. drive of 5.0 Amps

How they have a max drive current of 5A?
It is a direct drive flashlight, there is no 5A limit per LED or any limit whatsoever in terms of current, it is going to be as high as the sum of all components in the current path allows to

But yeah that instant current on high drain fresh cells with a cold head might potentially kill the LEDs.

[WalkIntoTheLight]

@Hikelite

But yeah that instant current on high drain fresh cells with a cold head might potentially kill the LEDs.

I’m curious why you mention that high current “with a cold head” would kill the LEDs. Is that because a low junction temperature at the LED results in a higher current than when the junction heats up and causes some additional resistance?

Or are you referring to the high initial current, before the driver detects the temperature rise and ramps down the output?

If it’s just the latter, well, isn’t the light designed to handle that current? I know it’s way beyond spec, and will cause faster aging of the LEDs, but hopefully it won’t fry them!

Anyway, I’ve been using FET-driven lights in very cold temperatures (–20C or colder), but should I be concerned about turning them on max when it’s that cold?

[niraya]

Is the D4 being sold anywhere in Europe? :question: Thanks

[hIKARInoob]

@niraya

Is the D4 being sold anywhere in Europe? :question: Thanks

I don’t think so. But Hank from Intl-Outdoor ships to Europe.

[Nev]

eBay

[Majoroverkill]

Still waiting on my D4 :cry: and would like some input on cells for it. I have the VTC6 cells, are there any other cells that anyone recommends?

[ChrisGarrett]

I bought two VTC-5As for mine and two Aspire 18350s.

Li-Ion Wholesale:

Liion Wholesale Batteries | Li-ion battery/cell distributor

Chris

[moderator007]

@ChrisGarrett

I bought two VTC-5As for mine and two Aspire 18350s. Li-Ion Wholesale: https://liionwholesale.com/ Chris

That’s where I purchased My Aspire 18350’s also. Ordered them when I ordered the D4 a week ago. I have already received my 18350’s. Hank did send a shipped notification email today. I didn’t receive a tracking number even though I paid the extra 2 bucks for it. :person_facepalming: I emailed hank. We’ll see how that goes.

I Don’t think there is a better 18350 cell on the market at this moment. Im going to try the Sony 18650VTC6 when they get here also.