2000k flashlight

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staticx57
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cetary
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That has been my observations when comparing the 1800K Cube to my 2000K E21A. The E21A looks positively like a regular incandescent lamp in comparison. I also have an SST-10 deep red, and my chromatic adaptation kicks into overdrive and even 2700K looks like midday “daylight”.

Could we get the tint closer to the BBL while keeping CCT low though? I see a surplus of light at 620nm, but that’s near red light. Maybe a minus red filter? I was thinking the usual Lee Minus Green. I’m guessing for the mix you used the 2200K/1800K Cubes?

djozz
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According to the datasheet the Cube has a massive chromaticity shift when warmed up, the 1800K version starts like in the chart above but at 85 degC (operating temperature in light fixtures) it drops down right on top of the BBL.

So we need bad heatsinking, something for a P60 drop-in? Smile

staticx57
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djozz wrote:
According to the datasheet the Cube has a massive chromaticity shift when warmed up, the 1800K version starts like in the chart above but at 85 degC (operating temperature in light fixtures) it drops down right on top of the BBL.

So we need bad heatsinking, something for a P60 drop-in? Smile

I did forget about this phenomenon, I do remember reading this in the datasheet. I did take these when the emitters were cool. Actually thinking about this, I can try again when they get warmer but the setup I am using is designed to make sure they do not get 85°C or even that warm to the touch.

cetary
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That might change the CRI/R9 values as well? Would make it a quirky emitter if the R9 got better the harder/hotter it was pushed.

xenotar80
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https://www.mouser.com/ProductDetail/Cree-Inc/MLBAWT-A1-0000-000UEA?qs=%...

would this be able to replace LEDs like the SST20 or 219B or 219C? Standard 3535 LEDs? And would it work well?

Can’t find very many warm options for 3535 LEDs.

HONDARIDER
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xenotar80 wrote:
https://www.mouser.com/ProductDetail/Cree-Inc/MLBAWT-A1-0000-000UEA?qs=%...

would this be able to replace LEDs like the SST20 or 219B or 219C? Standard 3535 LEDs? And would it work well?

Can’t find very many warm options for 3535 LEDs.


Just ordered some 2700K XP-L HI’s from Mountain Electronics. I’ve used 3000 and 3500k before quite a bit but never a 2700. Probably not a drastic difference.
xenotar80
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HONDARIDER wrote:
xenotar80 wrote:
https://www.mouser.com/ProductDetail/Cree-Inc/MLBAWT-A1-0000-000UEA?qs=%...

would this be able to replace LEDs like the SST20 or 219B or 219C? Standard 3535 LEDs? And would it work well?

Can’t find very many warm options for 3535 LEDs.


Just ordered some 2700K XP-L HI’s from Mountain Electronics. I’ve used 3000 and 3500k before quite a bit but never a 2700. Probably not a drastic difference.

I really do want something 2200K and under. But I also did get some SST20 2700K from kaidomain! Going to give that a try and see how they turn out. Probably in an acebeam headlamp

cetary
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You can go for the 2200K Cree XT-E or or the 2500K Osram Oslon SSL-180 for 3535 drop installed. They don’t have the best appearence though, 80 CRI only. My 2700K XP-L HI turned out to be closer to 3000K in the SMO Convoy C8.

I’ve ordered the FW3A copper, and will be sticking some 2700K SST-20’s in it, can’t wait.

xenotar80
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cetary wrote:
You can go for the 2200K Cree XT-E or or the 2500K Osram Oslon SSL-180 for 3535 drop installed. They don’t have the best appearence though, 80 CRI only. My 2700K XP-L HI turned out to be closer to 3000K in the SMO Convoy C8.

I’ve ordered the copper FW3A copper, and will be sticking some 2700K SST-20’s in it, can’t wait.

nice! just ordered fw3a too and will put the sst20 2700K in it too. seems like that’s the lowest cct and highest CRI option we have for a 3535 footprint

cetary
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xenotar80 wrote:

nice! just ordered fw3a too and will put the sst20 2700K in it too. seems like that’s the lowest cct and highest CRI option we have for a 3535 footprint

Pretty much. My example of the 2500K Osram Oslon had a higher CCT then the 2700K SST-20 95 CRI as did the 2200K XT-E.

xenotar80
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Have you tried dedoming the sst20 2700K? that might make it warmer maybe?

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xenotar80 wrote:
nice! just ordered fw3a too and will put the sst20 2700K in it too. seems like that’s the lowest cct and highest CRI option we have for a 3535 footprint

When Clemence will be less busy with his city light project, he will make a triple MCPCB for Nichia E21A (lowest CCT 2000K but R9050)
SKV89
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The E21A 2000k has been verified many times to be 9080

xenotar80
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Tally-ho wrote:
xenotar80 wrote:
nice! just ordered fw3a too and will put the sst20 2700K in it too. seems like that’s the lowest cct and highest CRI option we have for a 3535 footprint
When Clemence will be less busy with his city light project, he will make a triple MCPCB for Nichia E21A (lowest CCT 2000K but R9050)

fw3a with E21A would be amazing. can’t wait.

xenotar80
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SKV89 wrote:
The E21A 2000k has been verified many times to be 9080

yeah i think maukka measured the e21a 2000K with an R9 of 98

Geuzzz
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xenotar80 wrote:
cetary wrote:
You can go for the 2200K Cree XT-E or or the 2500K Osram Oslon SSL-180 for 3535 drop installed. They don’t have the best appearence though, 80 CRI only. My 2700K XP-L HI turned out to be closer to 3000K in the SMO Convoy C8.

I’ve ordered the copper FW3A copper, and will be sticking some 2700K SST-20’s in it, can’t wait.

nice! just ordered fw3a too and will put the sst20 2700K in it too. seems like that’s the lowest cct and highest CRI option we have for a 3535 footprint

You could try the Lee zircon amber filters to get even lower cct.

http://www.leefilters.com/lighting/zircon.html#zircon-warm-amber

djozz
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The measurent was in the hotspot on high setting. The Mi1C does have a AR-coated lens that may have affected tint a bit.

SKV89
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Djozz which emitter did you measure?

xenotar80
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djozz wrote:
p=.

The measurent was in the hotspot on high setting. The Mi1C does have a AR-coated lens that may have affected tint a bit.

i’m assuming that’s an E21A in 2000K. looks like it to me. what flashlight and mcpcb is that?

djozz
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I did not know that I posted a quiz Smile

The light is a Klarus Mi1C in copper, the led an E21A 2000K R9050, bought from Clemence. But it behaves like a R9080.

cetary
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People are on about “look at how candle-like this 3000K XP-L HI is” with their Anduril lights, but the Copper FW3A, Anduril Candle Mode, and finally candle colored 2000K LEDs…yes the actual copper candle. Cool Not to bash on Djozz

Agro
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Samsung offers LM302Z+ mid power LED with CCT down to 1800K. CRI80 only.
Not that it’s some great option but that’s an option. Clemence sells compatible MCPCBs.

Agro
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Another 2000K option:
Nichia NF2W757GT-V3F1 is another 2000K CRI80.

samyy
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Just discovered on AE this

Ok, it looks like cheap chinese no-name LED. But what do you guys think? Does it deserve an attention?

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