[Optisolis/E17A/E21A] Jetbeam Jet-µ

Hmm… The red of the crayon in pic 1 looks like typical low CRI / red deficit lighting.
But i doubted too, because the glass in pic 1 looks green as glass often does.

Hum, you may be right too!
I was looking more towards the pink crayon, not the red, and it seems more “natural” to me. Hence my vote.

Looking now at the yellow crayon on picture #1, it seems to have less yellow colour.
But my monitor may be influencing my perspective, as I noticed differences between the computer and the cellphone :confounded:
Also, I guess the tint of the light is (the) tricky thing here, leading to see the colours differently. I noticed than when I put the Sofirn CO1 (both colour temp) against Nichias and NW XP-G2. The first impact was the same, but going into detail the differences could be seen.

Despite, I will keep my vote on #1 and let the right correct the wrong :wink:

How sure can we be this test, with side by side comparisons, isn’t also a demonstration of the aforementioned Slider effect ?

OK, for those downloaded the quiz answer, here’s the password: thepasswordisthepassword

ANSWER:

1. Maukka Calibrated Convoy S2 @medium mode(Cree XML2)

CCT = 6497K
CRI = 74,8
R9 = –11,2
Duv = 0,0012

2. Maukka Calibrated BLF-348 (Nichia 219C)
CCT = 5025K
CRI = 92,5
R9 = 84,4
Duv = 0,0038

3. Jetue21a at 230mA (Nichia E21A sm503 R9080)
CCT = 5333K at 700mA
CRI = 97
R9 = 85
Duv = –0,0011 at 700mA

4. Jetusolis at 230mA (Nichia Optisolis sm503 Rfc00)
CCT = 4852K at 65mA
CRI = 99
R9 = 93
Duv = 0,002 at 65mA

My Observation:
As predicted, it’s harder than comparing R70 to R8000 or R70 to R9080. Because I used 3 LED with measured value above R9080. To make things worse I believe most people here still limited to LCD, LED, or AMOLED screen with RGB light source. Until there’s a full spectrum screen, reliable CRI proofs can’t be shared as images. Quantitative data such as Maukka’s test is the only valid reference point. In image 4, we can’t see how Optisolis makes green, blue, purple, and violet “glows” as E21A does on all red pigmented crayons (pink, orange, yellow, red, brown) because most monitors still can’t reproduce wide range cyan.
Most, including me, judge the CRI by the vividness of each colors. But it’s harder because the tint masks them all. Number 4 which was Optisolis has the most neutral tint (background) yet keeps the entire color vivid, the majority will choose it. Tint is dominant shades that covers the entire scene. Any colors will be affected by the shades.
High CRI LED will makes each color has their own personality no matter what tint/shades added on them. Easier to distinguish. This can be seen under very warm CCT such as Nichia E21A 2000K and low pressure sodium. In both cases, you will not find any white but you can easily distinguish which is which under E21A 2000K. Under LPS everything looks almost the same, sometimes false. The same goes for pink/rosy tint. You can see how everything looks reddish under E21A, blue looks darker and somewhat purple-ish.

Here’s my old picture under LPS lights. Can you tell the colors?

And this is a fresh picture using Maukka’s Jetue21a 2000K R9080:

Of course you can’t see blue violet purple etc… properly as under cool white because warm white light source even ultra high CRI such as very warm incandescent has very limited spectrum towards those colors.

Green and yellow shades relates to sickness and dizzyness for most people. Red - Orange shades relates to safety and comfort. Red/pink shades relates to cheerfulness, energy, happines, and….arousal. How about shades of blue/magenta? I find most people find it as cold and mysterious. IMHO, our brain evolved to welcome/accept positive and safe traits more readily.
We can easily adapts to different shades after a while (30+ minutes?) and find everything looks normal with time. But sudden change will confuse our brain. Test yourself by entering a room lighted in 3000K in the middle of a sunny day and you’ll get what I mean.
In above quiz E21A and XML2 were the tricksters while Optisolis was the honest one. Get a Nichia or Lumileds catalog and you will find how they tailor made LEDs to help lighting designer to trick their customers by offering different kind of spectrum sets for every needs. 219B sw45k and the likes was designed for specific target such as fresh meat in the grocery stores. But some also found it extremely good to increase baby population.
Check this link: Special CRI

- Clemence

Woop, what do I win? A bill for your Jetusolis? Ok Ok, i’ll pay it…

Hey, i had it right ! :student:
What did i win??? :partying_face:

You, Jerommel, and Zak answered it like a champion. You guys can share the crayons. Where shoild I ship it?

- Clemence

For my acceptance speech I would like to thank: my IPS monitor and my 2 year old :person_facepalming:

Whelp, I got fooled into thinking the Optisolis was sunlight, guess I’ll have to buy one now. The difference between Optisolis an the E21A is larger than E21A vs 219C.

Yay, crayons !!
Ship them with my next order please. :smiley:

Hey, but the R9 value of that 219C, is it always that high?

(PS: i have a 6 year old 23” Medion (an Aldi brand) monitor)

But who gets what color crayons? :stuck_out_tongue:

Almost all 219C R9050 exceeds its rating. Maukka got it from other source, not me. But my 219C sm503 R9050 also exceeded R9050. OK, the crayons will be shipped to Jerommel then.

Here’s my 219C R9050 Maukka’s test result:

- Clemence

I wish Optisolis is a single die LED with lower voltage. For me 6500K Jetue21a, way more versatile. I made the VR10S1-757 just for those curious with Optisolis.

- Clemence

I still don’t understand a thing of those test graphs…
Except for the spectrum top middle and the numbers top right…

And i have a question.
Since E17A is mentioned in the topic title, do you have them for sale?
I think a quad will fit nicely on a 3535 footprint, and still able to handle (i guesstimate) 15 Watts (?)

I only have very small numbers of E17A at the moment (sm505 R70, red, green, blue, and amber). One of my next MCPCB would be quadtrix E17A to fit 3535 class (3/6/9/12V configurable).

- Clemence

As I said, the right correct the wrong :smiley:
Total failure on my CRI assessment :person_facepalming:
It was fun, though :wink:

I’m such a CRI baby that 92.5 looks low to me. Come to think of it, most of the lights I use regularly actually are higher than that, but I think it’s the Duv that threw me on #2.

Didn’t expect #2 to be 219c because 219c normally is very positive DUV (above BBL) and greenish. The Optisolis does look like the best daylight simulator.

Somehow I dont think this will change your mind about above BBL tints. I think most people did not mind the positive DUV in these pictures (which actually show something and not just a white wall) yet it is horrific to even consider such a thing on paper. (both literally and figuratively)

Clemence I really thought this was a cool test. I had guessed #1 but I believe there is false information added to it by the white balance adjustment. I opened it up in Photoshop and increased the color temp and all of the reasons I thought it was high CRI went away. It is dull and lifeless at a cooler temp. This doesnt happen to me when I use say the 6500k E21A R9080. Granted I don’t have the RAW to set a fixed WB and I do not have the crayons to do my own test.