Nichia NV4WB35AM

mountainair26 · 2021-04-25T06:33:09.000Z

https://www.eurekatronix.com/product-page/nichia-b35ax

Anyone care to explain how the bins differ? For instance, what’s the difference between the three E900 bins that are all R9080, but their prefix is sm503, sm573, sm653? Is that color temperature? I think the “e900” is indicating the output bin? No help from the data sheet. Thanks, considering ordering from Virence when I can and putting in Sofirn Sd05 6v version.

Nevermind, found the answer on page 5 of this data sheet on the new high CRI options:
http://www.nichia.co.jp/specification/products/led_spec/NV4WB35AMT-E(5768D)R70%20R8000%20R9080.pdf

Anyone get one and try it out yet?

id30209 · 2021-04-25T17:05:44.000Z

I have one of each variant (R9080) coming from ERKX. Will let you know how are they.

Pavlo · 2021-04-25T17:06:34.000Z

What host are you putting them in?

id30209 · 2021-04-25T17:09:13.000Z

Pavlo:

What host are you putting them in?

First i’ll try with Convoy S21B then i’ll test them with McGizmo reflectors. Mostly in high power lights

hinbli · 2021-04-25T18:51:11.000Z

I am interested in the results, too.

id30209 · 2021-04-25T18:58:37.000Z

hinbli:

I am interested in the results, too.

I don’t have Luxmeter nor spectrum analizer... LOL

hinbli · 2021-04-25T19:33:26.000Z

This is a new LED and still uncommon. There is not much of information available, other than the data sheet. It is just nice to see them installed in the lights.

The_Driver1 · 2021-04-28T16:51:35.000Z

Agro:

They are already available from ledrise but the price is ouch. I’m waiting for Clemence as well.

Did you receive yours yet?

Agro · 2021-04-28T20:16:18.000Z

I haven’t ordered yet. I don’t have the right conditions to do any modding nowadays and my excitement has faded.

Dalamar · 2021-04-29T16:50:52.000Z

Is this my long awaited high CRI thrower? Right after I order GT94?

I want one in a triple-sized 21700 C8 with parallel batteries.

Agro · 2021-05-01T09:23:15.000Z

It’s not really a thrower LED. It has larger die area than SBT90.2 and produces far less output. I think Clemence has tested that but I can’t find the results now.
Anyway E21A is not a thrower LED and this one will only throw less. But when high CRI is a requirement, there are very few choices - and this is a fair one.

ADDED:

The high CRI variant does not much more than 2000 lm at the peak. So intensity is ~3 times lower than that of Boost HX.

lumenzilla · 2021-07-15T09:43:47.000Z

I got mine from Clemence (Sm505 E1200 R70) but haven’t got any chance to test it yet.

elendur · 2021-10-31T19:12:04.000Z

Agro:

It’s not really a thrower LED. It has larger die area than SBT90.2 and produces far less output. I think Clemence has tested that but I can’t find the results now.
Anyway E21A is not a thrower LED and this one will only throw less. But when high CRI is a requirement, there are very few choices - and this is a fair one.
[picture]
The high CRI variant does not much more than 2000 lm at the peak. So intensity is ~3 times lower than that of Boost HX.

3 times lower intensity than Boost HX… does that generally mean 3 times lower candela once place inside a reflector?

Agro · 2021-11-01T06:43:55.000Z

elendur:

Agro:

It’s not really a thrower LED. It has larger die area than SBT90.2 and produces far less output. I think Clemence has tested that but I can’t find the results now.
Anyway E21A is not a thrower LED and this one will only throw less. But when high CRI is a requirement, there are very few choices - and this is a fair one.
[picture]
The high CRI variant does not much more than 2000 lm at the peak. So intensity is ~3 times lower than that of Boost HX.

3 times lower intensity than Boost HX… does that generally mean 3 times lower candela once place inside a reflector?

Generally yes.

iamlucky13 · 2021-11-02T00:54:12.000Z

elendur:

Agro:

It’s not really a thrower LED. It has larger die area than SBT90.2 and produces far less output. I think Clemence has tested that but I can’t find the results now.
Anyway E21A is not a thrower LED and this one will only throw less. But when high CRI is a requirement, there are very few choices - and this is a fair one.
[picture]
The high CRI variant does not much more than 2000 lm at the peak. So intensity is ~3 times lower than that of Boost HX.

3 times lower intensity than Boost HX… does that generally mean 3 times lower candela once place inside a reflector?

Math nitpick warning:

Technically that should be 2/3 lower (1/3 the original value).

3 times lower would imply negative light.

Agro · 2021-11-02T06:38:32.000Z

iamlucky13:

elendur:

Agro:

It’s not really a thrower LED. It has larger die area than SBT90.2 and produces far less output. I think Clemence has tested that but I can’t find the results now.
Anyway E21A is not a thrower LED and this one will only throw less. But when high CRI is a requirement, there are very few choices - and this is a fair one.
[picture]
The high CRI variant does not much more than 2000 lm at the peak. So intensity is ~3 times lower than that of Boost HX.

3 times lower intensity than Boost HX… does that generally mean 3 times lower candela once place inside a reflector?

Math nitpick warning:

Technically that should be 2/3 lower (1/3 the original value).

3 times lower would imply negative light.

I used to think that “3 times lower” means y = x / 3 but “lower by 3 times” means y = x - 3 * x = ~~2 * x. That is~~ the first term is multiplicative and the other additive. That’s how it works in my native language. I read your message as “3 times lower” means y = x - 3 * x = –2 * x in English. Have I used it wrong for all these years? I see you’re from the USA, so I assume you’re either native or advanced Engligh user. Is there a multiplicative term in English?

iamlucky13 · 2021-11-05T03:23:59.000Z

Agro:

iamlucky13:

elendur:

Agro:

It’s not really a thrower LED. It has larger die area than SBT90.2 and produces far less output. I think Clemence has tested that but I can’t find the results now.
Anyway E21A is not a thrower LED and this one will only throw less. But when high CRI is a requirement, there are very few choices - and this is a fair one.
[picture]
The high CRI variant does not much more than 2000 lm at the peak. So intensity is ~3 times lower than that of Boost HX.

3 times lower intensity than Boost HX… does that generally mean 3 times lower candela once place inside a reflector?

Math nitpick warning:

Technically that should be 2/3 lower (1/3 the original value).

3 times lower would imply negative light.

I used to think that “3 times lower” means y = x / 3 but “lower by 3 times” means y = x - 3 * x = ~~2 * x. That is~~ the first term is multiplicative and the other additive. That’s how it works in my native language. I read your message as “3 times lower” means y = x - 3 * x = –2 * x in English. Have I used it wrong for all these years? I see you’re from the USA, so I assume you’re either native or advanced Engligh user. Is there a multiplicative term in English?

The literal meaning in English is y = x - 3*x = –2*x.

However, most people in the US mean x/3 when they say 3 times lower.

Agro · 2021-11-05T03:40:26.000Z

I see, thx

Barkuti · 2022-01-01T22:31:46.000Z

Agro:

…

ADDED:

…

Weirdest output graphs ever seen! Are you sure this is correct? Oh! There's a change of scale at 1A and upwards on the x-axis.

These look very well suited to be driven with a 3A “6V XHP50” driver.

Clemence is only listing 4S or 12V versions in his website, this is less desirable from a flashlight point of view; at least if one is looking for a compact ∅20mm 12V boost driver. :-/

P.S.: considering that it is a very high colour rendering led, I'd say it can be considered thrower in its class.

Barkuti · 2022-03-19T01:10:55.000Z

Just came here to point out a slight incorrection in the above test graph:

Where it says “max. recommended current” for the NV4WB35AM the value (2.5A) is wrong. I am right now peeking at the NV4WB35AMT (NICHIA STS-DA1 5768D <Cat.No.201223>) datasheet and in Absolute Maximum Ratings it says forward current 1800mA and pulse forward current 2400mA.