i don’t know really
i don;t really expect colors to look right at night anyway, so if it is a little off, i don;t get alarmed at it
also around the house, there are many light sources
warm leds
daylight leds
some cfl
led tv
phone
computer screen
phone
so asking what light source i use in addition to the flashlight, and then requiring 45 minutes to get used to each one, or is there a streetlight out the window, or is the moon full, doesn;t really make sense
wle
The YAG phosphors do indeed push red and deep red to. That’s where their efficiency drops off. The low color rendering LEDs have little red light, but are a bit more efficient. The high color accuracy lights, preferred around these parts, push more red/cyan.
The reason I asked about the phones, smart devices, TVs, and such is that their LED back panels are typically color calibrated for daytime use, and have color temperatures routinely near 6000K. Running F.Lux, or some other blue reducing software, removes the blue and shifts the screen to a warmer color. Looking at a bright 6000K LED screen can skew your adaptation to very blue light sources and make lights like 3000K appear more yellow then what they really are. The “daylight” LED with its 5000K color temperature, as well, will skew things if used allot at night like on a table lamp nearby for reading.
Sounds like you need some high CRI lighting, minimum 90 CRI preferably 95 CRI. Your state does not, unfortunately, have the same Title 24 law the California does that mandates a minimum of 90 CRI for all LED replacement lamps. This law was put in place because of how poorly 80 CRI CFLs did. They distorted colors and gained a bad reputation. Title 24 was put in place to make peoples’ experiences with LED more positive by pushing industry towards high quality light.
Has anyone took any measurements of the Luminus Cube. They sound very interesting.
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! 
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
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 
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.
