KR4 Nichia E21A version in stock

1664 posts / 0 new
Last post
lightdecay
Offline
Last seen: 30 min 49 sec ago
Joined: 06/17/2019 - 08:55
Posts: 175
Location: U.S.A.

SST-20 3000K is a great LED with high R9. A cheap and easy way to make it better is to add a minus green filter.

Try adding a Lee Zircon 803 (weaker) or 802 (stronger) minus green filter before you decide to do an emitter swap. In my experience SST-20 3000K paired with a minus green filter looks better than Nichia 219B R9050 sw30.

pol77
Offline
Last seen: 21 hours 21 min ago
Joined: 02/21/2019 - 07:54
Posts: 150
Location: London

lightdecay wrote:
SST-20 3000K is a great LED with high R9. A cheap and easy way to make it better is to add a minus green filter.

Try adding a Lee Zircon 803 (weaker) or 802 (stronger) minus green filter before you decide to do an emitter swap. In my experience SST-20 3000K paired with a minus green filter looks better than Nichia 219B R9050 sw30.

Possibly, but I bet it does not look better than Nichia 219b R9080 sw30.

Unheard
Online
Last seen: 5 min 46 sec ago
Joined: 01/16/2019 - 11:38
Posts: 708
Location: Germany

Yeah, mine has been shipped today. Nice cyan KR1 w/ XP-L 4000K Love .

iamlucky13
Offline
Last seen: 4 hours 30 min ago
Joined: 06/22/2018 - 09:18
Posts: 780
Location: USA

I’d like to request that the first person to try out a hollowed out artificial candle as a diffuser for a 2200K KR4 share a short video clip of the result, preferably next to a real candle for comparison.

It just seems to me like this should work really well.

Hikelite
Offline
Last seen: 1 week 6 days ago
Joined: 07/13/2011 - 16:18
Posts: 3778
Location: RO

https://doi.org/10.1117/1.JPE.4.043598

“Candle shows different color temperatures (CTs) at different positions inside the flame. The CT varies from 1847 to 2626 K for the white candle studied
herein. To represent, the CT of the brightest spot is chosen, which is 1914 K”

The CRI value for this candle is 83

“a candle with 1914 K and an 83 CRI

SKV89
Offline
Last seen: 2 hours 32 min ago
Joined: 12/10/2017 - 12:46
Posts: 3880
Location: US

Candles are normally about 1800K overall and 100 CRI.

Hikelite
Offline
Last seen: 1 week 6 days ago
Joined: 07/13/2011 - 16:18
Posts: 3778
Location: RO

SKV89 wrote:
Candles are normally about 1800K overall and 100 CRI.

Source for that 100 CRI?
SKV89
Offline
Last seen: 2 hours 32 min ago
Joined: 12/10/2017 - 12:46
Posts: 3880
Location: US

Google

raccoon city
raccoon city's picture
Offline
Last seen: 3 hours 29 min ago
Joined: 10/06/2010 - 02:35
Posts: 13939
Location: रॅकून सिटी Palm Desert CA USA
Hikelite
Offline
Last seen: 1 week 6 days ago
Joined: 07/13/2011 - 16:18
Posts: 3778
Location: RO
SKV89 wrote:
Google

When someone claims something they need to quote a study. Google is not a source is a search engine which will give you all the results you want and you don’t want.
That is why I have posted above a quotes from a study.

EasyB
Offline
Last seen: 9 hours 38 min ago
Joined: 03/09/2016 - 15:24
Posts: 2002
Location: Ohio

Hikelite wrote:
https://doi.org/10.1117/1.JPE.4.043598

“Candle shows different color temperatures (CTs) at different positions inside the flame. The CT varies from 1847 to 2626 K for the white candle studied
herein. To represent, the CT of the brightest spot is chosen, which is 1914 K”

The CRI value for this candle is 83

“a candle with 1914 K and an 83 CRI

!{width:50%}https://i.postimg.cc/13PHKNnb/JPE-4-1-043598-f001.png!

They don’t give any explanation for how the flame deviates from a black body spectrum. In my opinion that is incomplete, especially when they are attempting to use that 83 CRI number to show that their LED somehow gives off “better” light than a candle.

iamlucky13
Offline
Last seen: 4 hours 30 min ago
Joined: 06/22/2018 - 09:18
Posts: 780
Location: USA
Hikelite wrote:
SKV89 wrote:
Google

When someone claims something they need to quote a study. Google is not a source is a search engine which will give you all the results you want and you don’t want.
That is why I have posted above a quotes from a study.

They don’t need to, but I always appreciate when someone is able to quote a study, especially if the claim does not match my expectation.

To get to the point, even sunlight does not perfectly replicate its own reference, which above 5000K is a standard illuminant that mixes direct sunlight and scattered skylight, in reality varies. I’d be somewhat curious to see measurements of sunlight at different times of day to see how measured CRI and DuV changes, and whether it ever quite measures 100, or tends to stay in the 99.x range.

Below 5000K, the reference for CRI is a theoretical black body, and there can again be some differences because of absorption and discrete emission effects that I assume are present. It should be extremely close 100, but I’ve also never seen an actual candle measurement.

I’m particularly curious about thorium mantle lanterns, because I know they have some strong discrete emissions, and might as a result be quite significantly short of 100 CRI.

  • Edit – just saw the paper linked above has a CRI measurement. I’m reading the paper now. 83 CRI surprises me and raises some questions, such as whether that is an integrated measurement.
cetary
Offline
Last seen: 14 hours 18 min ago
Joined: 10/28/2018 - 20:41
Posts: 122
Location: virginia

iamlucky13 wrote:

They don’t need to, but I always appreciate when someone is able to quote a study, especially if the claim does not match my expectation.

To get to the point, even sunlight does not perfectly replicate its own reference, which above 5000K is a standard illuminant that mixes direct sunlight and scattered skylight, in reality varies. I’d be somewhat curious to see measurements of sunlight at different times of day to see how measured CRI and DuV changes, and whether it ever quite measures 100, or tends to stay in the 99.x range.

Below 5000K, the reference for CRI is a theoretical black body, and there can again be some differences because of absorption and discrete emission effects that I assume are present. It should be extremely close 100, but I’ve also never seen an actual candle measurement.

I’m particularly curious about thorium mantle lanterns, because I know they have some strong discrete emissions, and might as a result be quite significantly short of 100 CRI.

  • Edit – just saw the paper linked above has a CRI measurement. I’m reading the paper now. 83 CRI surprises me and raises some questions, such as whether that is an integrated measurement.

That paper I suspect may not be accurate. We have people with spectrometers here on these forums that can run those tests easy to verify the claims. Mantle lanterns were already tested here. The mantle in question has a 98 CRI, essentially perfect.

contactcr
Offline
Last seen: 6 hours 48 min ago
Joined: 05/19/2017 - 18:52
Posts: 2984
Location: US

Integrating toilet, measurement taken from about 18” directly above:

Pretty great CRI and the steak house is pretty good too.

Dougdimadome
Offline
Last seen: 11 hours 32 min ago
Joined: 04/24/2019 - 19:54
Posts: 38
Location: California

Can anyone be so kind and explain what does R9080 or R9050 mean or the difference? Is that the CRI of the led?

contactcr
Offline
Last seen: 6 hours 48 min ago
Joined: 05/19/2017 - 18:52
Posts: 2984
Location: US
Dougdimadome wrote:
Can anyone be so kind and explain what does R9080 or R9050 mean or the difference? Is that the CRI of the led?

It’s Nichia terminology. First two numbers are CRI and last two are CRI (R9). I believe it’s the minimum or average? that bin is rated for.

Dougdimadome
Offline
Last seen: 11 hours 32 min ago
Joined: 04/24/2019 - 19:54
Posts: 38
Location: California

Thanks for the response! Very much appreciate it.

iamlucky13
Offline
Last seen: 4 hours 30 min ago
Joined: 06/22/2018 - 09:18
Posts: 780
Location: USA

contactcr wrote:
Integrating toilet, measurement taken from about 18” directly above:

Pretty great CRI and the steak house is pretty good too.

Awesome! Thanks for doing this, and my compliments on the fancy white integrating toilet. It’s probably a good thing you didn’t try this one inside a styrofoam sphere.

98.4 is in the ballpark I expected, and the R9 is just about perfect. It is possible that the porcelain is not entirely neutral and is affecting the measurement of the reflected light, but I doubt it has a very large effect.

contactcr
Offline
Last seen: 6 hours 48 min ago
Joined: 05/19/2017 - 18:52
Posts: 2984
Location: US

Probably one of those “studies” you order when you are selling OLED candles and you need to make them look good.

Either that or I have some high CRI wax I should be selling.

gchart
gchart's picture
Offline
Last seen: 6 hours 51 min ago
Joined: 03/19/2016 - 11:57
Posts: 2291
Location: Central IL

contactcr wrote:
I have some high CRI wax I should be selling.

Great, I’ll take some in 2000K please. But if you can’t ensure a negative DUV, the deal is off.
anonymous_user
Offline
Last seen: 6 hours 49 min ago
Joined: 05/23/2019 - 21:59
Posts: 246
Location: CA, USA

Did Hank originally offer green trits as an option for the KR1 tailcap? I don’t see green as an option currently.

Agro
Agro's picture
Online
Last seen: 2 min 55 sec ago
Joined: 05/14/2017 - 11:16
Posts: 6076
Location: Ślōnsk
contactcr wrote:
Dougdimadome wrote:
Can anyone be so kind and explain what does R9080 or R9050 mean or the difference? Is that the CRI of the led?

It’s Nichia terminology. First two numbers are CRI and last two are CRI (R9). I believe it’s the minimum or average? that bin is rated for.


Nichia uses minimum. Some makers use average. Some users apply Nichia-style 4-digit specs to LEDs from other makers.
So it’s usually good to state whether it’s XXXX min. or XXXX typ.
alex64
alex64's picture
Offline
Last seen: 1 day 15 hours ago
Joined: 03/16/2017 - 01:42
Posts: 133
Location: Balearic Islands

Hank, It’s https://www.noctigon.com/ the new shop or it’s a fake site?

SKV89
Offline
Last seen: 2 hours 32 min ago
Joined: 12/10/2017 - 12:46
Posts: 3880
Location: US

Hank, when will the E21A 16emitter mule version be available? Waiting for that to order a few lights from you.

pepinfaxera
Offline
Last seen: 19 min 17 sec ago
Joined: 06/25/2015 - 12:53
Posts: 298
Location: Gijón - Spain - Europe

alex64 wrote:
Hank, It’s https://www.noctigon.com/ . . . or it’s a fake site?
Probably. It’s a weird place.

The address of Hank Wang, (Noctigon) is as follows:

https://intl-outdoor.com/
.
Will it be the place in EEUU, USA?

I don’t know,

Desconfío,

I’m suspicious,

I’ve seen this other address for the site in the US.

https://intl-outdoor.com/us-warehouse-product.html

Sorry for my bad English
(google translator) , (https://www.deepl.com/translator)

gregor
gregor's picture
Offline
Last seen: 14 hours 50 min ago
Joined: 01/09/2015 - 16:35
Posts: 598
Location: Slovenia
alex64 wrote:
Hank, It’s https://www.noctigon.com/ the new shop or it’s a fake site?

Fitness store + flashlights, very strange. Question
Maybe fake site.

Hank Wang
Offline
Last seen: 1 hour 30 min ago
Joined: 10/19/2011 - 10:28
Posts: 487
Location: China
gregor wrote:
alex64 wrote:
Hank, It’s https://www.noctigon.com/ the new shop or it’s a fake site?

Fitness store + flashlights, very strange. Question
Maybe fake site.

This is our new site, which we are still working on it.

https://intl-outdoor.com, Noctigon, Emisar, flashlight components.

Hank Wang
Offline
Last seen: 1 hour 30 min ago
Joined: 10/19/2011 - 10:28
Posts: 487
Location: China

https://intl-outdoor.com, Noctigon, Emisar, flashlight components.

scintillator
Offline
Last seen: 17 hours 42 min ago
Joined: 06/12/2014 - 10:11
Posts: 140

Those mules are nice.

pepinfaxera
Offline
Last seen: 19 min 17 sec ago
Joined: 06/25/2015 - 12:53
Posts: 298
Location: Gijón - Spain - Europe

Hank Wang wrote:

https://www.noctigon.com/
This is our new site, which we are still working on it
I couldn’t get in “login”

Do we have to create / register a new account?

Sorry for my bad English
(google translator) , (https://www.deepl.com/translator)

Pages