2000k flashlight

has a 1.6 x 1.6mm footprint, see page 10

they do sound interesting. been reading everything i can get to figure out how to get one to work.

which lantern did you end up modding? that sounds quite interesting!

I would like to but they are only from sellers that ask high shipping costs to the EU. I wait until I have a nice list with other leds too before I order them.

Looking forward to your test! :smiley:

haha i didn’t understand your question… obviously not physical measurements

Thanks for posting that. Disappointed that R9 is not 90+ like the E21A 2000k. Wonder what the DUV and Rg is.

I’m pretty sure the E21A at 2000K R9 is at around 50. the variant that Virence sells is 9050. most of the other E21a he sells is 9080 except the 2000K and 2200K

http://www.nichia.co.jp/specification/products/led_spec/NVSLE21AT-E(3825J)R70%20R8000%20R9050%20R9080.pdf

I measured the E21A 2000k 9050 in Tiara Pro:
CCT: 2016K
DUV: –0.0003
R9: 89.2
Rg: 101
Rf: 94

Maukka’s measurements were very similar

wow, that’s pretty awesome. good to know! i think i want more e21a in 2000K now :slight_smile:

Maukka got R9 of 89 at 1000ma but got R9 of 98 at 100ma. So at lower output, R9 is higher. I haven’t tested the low output because too lazy to close the shades to test but I’m sure it will be the same. I love this emitter for late night use especially because how little blue wavelength it emits.

Thus far I have been too cheap to purchase CT&A. I can take a DUV with another program. By the way the test is at 350mA across 12 emitters. These Xnova cubes are not high power LEDs. They spec even less than the optisolis for drive current. Far from E21A output.

The 1800k Xnova is also unique as it will make the 2000k E21A look white. 1800k starts to cross into lighting that looks yellow.
1800k xnova on the left and E21A on the right

Black Flat Yellow not white flat amber


black flat yellow

xnova

flame

yes to low blue wavelength at night! Are there any other good options for mcpcb that can run the e21a other than the Virence mcpcb?

the flame looks so good. time to replace all my LEDs with flame

Keep in mind positive duv emitters when placed next to negative duv emitters of the same color temperature will make the negative duv emitters look white. My HI CRI LED strip with very negative DUV looks like NW when placed next to my 60 CRI very positive DUV led strip. Both measured 3000k but the very negative duv led strip looks 1000k cooler.

I don’t think so. I buy all my E21A presoldered onto Virence boards. I’ve been modding a bunch of AAA lights with E21A and Optisolis using his 10mm boards. Personally I like the E21A much better than Optisolis.

Yes, the flame’s output is so natural looking. Unfortunately it’s not as easy to EDC a flamin’ torch (I mean, that long piece of wood sticking out of the pocket might be misinterpreted). :stuck_out_tongue: Um, how much runtime can one get on a Zippo?

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?