thanks, super helpful!
great Tint plots, E21 6500k tint looks really close to BBL
related: djoz put an E21 2200k version in an S Mini Copper
yes, I can see how the Osram Square would look yellow, since I have a 3000k N219c that I consider yellow, and it sits even closer to the BBL. Also have N219c 4000k, that I find rather green.
After reading the Wiki Digested info cited, and since the subject of this thread has to do with R9, it could be constructive to point out, (AFAIK) R9 is not one of the parameters used in CRI calculations.
For this reason, it is needed for evaluation.
From myledy.com…
Color Rendering Index (CRI) and R9, are two vital elements to consider when choosing LED or necessary interior items…….For us to define the term R9, it is first important to understand what the Color Rendering Index is. Color Rendering Index is a rating system that measures the precision of how well a light source generates the color of an illuminated object. It gauges the light source’s capacity to display object colors “sensibly” or “normally” compared to a conversant reference source, either daylight or incandescent light. Color Rendering Index is an average value based on R1 to R8. R9 is one of the six saturated test colors not utilized in calculating CRI.
Since some percentage of the color Red can be found mixed into the various tints of most processed colors, the ability to precisely reproduce Red is key for accurately rendering colors of displayed objects. Lamps with high R9 values create the most vivid colors.
The Color Rendering Index metric is divided into 14 color ranges from R1 to R14. Color Rendition Index is an average value based on color ranges R1 to R8 of the metric, however, doesn’t consider the remaining six extra color references. A high CRI, matched with a high R9 value yields the most precise display of color
George Yo (Mr. Zebralight), has said (in posts included in other forums) he reserved the ‘n’ for inclusion as a suffix for his model numbers long ago, but was unhappy with Nichia’s previous method of binning either above, or below the ANSI BBL, instead of centered on it.
George has however, stated his personal dislike for the trademark Nichia rose hue, to nobody’s surprise.
Curious to imagine, with ZL’s previous use of Rebel emitters, anybody is going to get in a twit over sharing a miniscule slice of sales enough to compromise a business relationship (maybe a fact of life in Russia?).
Thank You!
I did not know those details. It explains how Yellow/Green tinted Zebras qualify as High CRI while still having rather Low R9.
High R9 for the Win!
Photo from official zebralight ebay selling page.
No comments.
I could meet some fake sellers with “zebralight” name. Somebody register them, and yes seems that they can be blocked by request. There was several accounts with *fire cell set.
I dont believe in ZL owner tint preferences. Nichia leds have another quality level, neverless tint or cri. Leds are always clean, perfectly centered, electrical properties range is very slim. But who wants to deal with them, if they dont provide whosale discount while another company can make unbeatable offer?
What about R12? Only the Oslon Square 3000K 95CRI goes above 80 points in that metric:
Cheers ^:)
Indeed the r12 is better than the 219b r9080 sw40
That ugly green Oslon has nothing on the E21A
Oh man that’s crazy great. Have you had a chance to test anymore? I tried the 6500k and it is stunning. Have a 2000k and 3000/4000 mix in the wings but need a host. These E21As are great.
Optisolis anyone?
wow Optisol
A few more for you jon,
Completely different model Osram Oslon Square. 96 typical CRI. These will fit anywhere a Nichia 219 will
In the midst of a computer upgrade so not all software is reinstalled yet but here are the bins. Both emitters are guaranteed to be below the BBL:
those look great!
all bars are above 90
whats not to like?
assuming the tint is not above the BBL, they look like winners 
Usually only the the Osram LEDs with 3500K and below have a good tint. The more neutral white ones have a more yellow tint.
Wow guaranteed below BBL and all bars above 90 seems to suggest this will be the king of good tint/cri emitters. Where do you buy these emitters? How does it perform besides tint and cri?
this is 3000k that maukka says has bad green tint (notice the tall green bar)
these are 3000 and 3500k without the tall green bar
seems there are factors relating to different models of those LEDs, not sure
Do any of you, except perhaps for Maukka, have the Samsung LH351Bs 3000k R9070?
Would like to see some data on it.
Jon, here is the binning for the 3000k Oslon tested. Not good, still trying to learn Osram’s naming schemes for these products to see which generation fits in where.
