[Reference] Nichia E17A/E21A (2000K - 6500K, R9050/R9080, color) CCT and tint shots

These two scenes are amazingly similar!

What’s that game called, Clemence?

AFAIK it starts with something “…find hidden objects…”

Thanks, Clemence! :+1: I hadn’t seen this ‘hidden object’ game genre before.

It seems your image is a screenshot from a game called ‘Criminal Case.’

Amber+Red

RGBA. Bad Rf, huge Rg. Very magenta.

Thanks for making that measurement. I suspected it would end up being unbalanced. Trying to build anything around this mix would result in a freakshow light if current to each channel can’t be managed separately. One the other hand, being able to adjust each channel individually would be what would make an RGBA light fun.

It seems like blue would need to be dialed back quite a bit, and perhaps the amber increased a little in order to get a more natural result.

Sure, by individually addressing the emitters, you can tune it to anywhere within the color space quadrangle they cover.

It’s trippy.

To save you time:
http://www.nichia.co.jp/specification/products/led/ApplicationNote_SE-AP00042-E.pdf

[Clemence]

Normally, the middle rank is the safest for good output at or below BBL tint. The higher the output the farther up from BBL the tint.

[Clemence]

Red E17A is perfect for turtles! :laughing:
https://conserveturtles.org/beachfront-lighting-turtle-friendly-fixtures-lights/

[Clemence]

Added lumens and efficacy numbers to the Google Sheet.

Individual Current-Flux-Voltage curves

2000K
2200K
2700K
3000K
3500K
4000K
4500K
5000K
5700K
6500K

Tint in an integrating sphere without any optics, i.e. how these measure diffused and how the binning is done (much closer to advertised CCT values)

Individual CRI data

2000K
2200K
2700K
3000K
3500K
4000K
4500K
5000K
5700K
6500K
2000K+6500K

GREAT job Maukka :+1: :beer: . These integrated measurements is extremely close to OEM rated, a good example of what to expect from 3 steps binned Nichias. Many thanks for all your efforts.
FYI, this also closer match to my tint shots in the OP (no optics, matte white reflector)

[Clemence]

Great job as usual Maukka, thank’s for measuring the requested mixes :+1:

The thought behind this is to get the tint of a d240 4000K Wizard Pro below the bbl on the medium modes since the current setup is above it even on M3 ~250lm as bob_mcbob measured. And I see 4000K+4500K is slightly below the BBL at around 450lm.

Speaking of, Maukka could you add info about which flux binning you used in cases more than one is available? Eg. your previous the 4000K you measured abut a year or more ago had the d220 bin but now you’ve measured the d240 bin.

I find the results a bit optimistic besides the 5000K (which bin?). At 700mA/led, thus around 990lm it’s pretty obvious the tint is going to be below BBL and the E21A is well known for that. Even the XHP50 WW in the Wizard is below BBL on turbo. 990lm is more a turbo mode than a regular used and sustainable mode in a typical host. What really matters is how every setup performs a medium mode and a low mode which are going te be used by fat the most in real world usage. IMO it would be more interesting to know how they perform at lets say 200lm or even less. That’s where the “big table” helps.

I couldn’t agree more…

But I’m actually open for a positive duv setup for special tasks. For walking in the woods I actually prefer positive duv above a pink tint, maybe because trees aren’t pink and leaves look less green under a pink tint :smiley:

Or maybe a 4500K (rosy)+5000K(greenish) mix to create a true neutral 4750K…

Clemence probably knows the flux bins. I just got the bare leds on mcpcbs.

New E21A flux bins measured by Maukka can be checked via my store. Sm503 = D240, sm403 = D240.
No LED can satisfy your needs for consistent tint. You asks for below BBL from the very low current yet stays there at very high current. This is almost impossible with such wide operating current, not with current technology. That’s why PWM control is highly desired in CCT and tint critical lighting.
If you want to get the most consistent tint and CCT, go with Optisolis. Or any mid power LED. There’s no magic here, with such low current range you wont get tint/CCT swings as those in high power LED.

[Clemence]

FYI, we tested all those LEDs at 700ma because that’s the current used for all E21A binning standard (Nichia)

[Clemence]

I don’t have needs for consistent tint. But I want them to have a decent tint at 100lm and above and my 3000K+4000K(d220) Wizard and 3000K d220 non-mixed Wizard give me that. That’s one of the reasons I’m extremely satisfied with it. I use low and medium modes the most and this mix gives a good tint even on low modes.

Eg. a 2x3500K+2x4500K mix at 0.1A/led ~140lm/otl will give a duv of (0,0007−0,0014):2= −0.0007.

are these possibly still an idea to make?. I need a 16mm MCPCB for Carlco 10507. E21A 503.

Yes, I have also a few Astrolux S41 to mod with such a triple.

Guessing that Clemence was busy because he didn’t post message on BLF recently I sent an e-mail asking if he still intend to make this triple E21A MCPCB and he responded :