Whats the most efficient deep red chip?

ChiefRunningPhist said:

OSRAM "Typical" electrical conditions..
2.07V, 0.35A, 0.7245W
View attachment 4399577

CREE "Typical" electrical conditions...
1.99V, 0.35A, 0.6965W
View attachment 4399571

OSRAM "Typical" μmol/J...
3.91μmol/J
3.91μmol/J(typ)× 0.7245W(typ)
=
2.83μmol/s(typ) @ 0.7245W(typ)
View attachment 4399569

CREE "Typical" μmol/J...
4.13 μmol/J+
2.88μmol/s(min) ÷ 0.6965W
=
4.13μmol/J+
.
~2.88μmol/s+(typ) @ 0.6965W(typ)
View attachment 4399568

This is what I've been going off of...

Click to expand...

Check out the square. That is the SSL correct?

https://dammedia.osram.info/media/resource/hires/osram-dam-7718278/GH CSSRM3.24_EN.pdf

https://www.osram.com/ecat/OSLON® Square GH CSSRM3.24/com/en/class_pim_web_catalog_103489/global/prd_pim_device_5516891/

Stephenj37826 said:

Check out the square. That is the SSL correct?

https://dammedia.osram.info/media/resource/hires/osram-dam-7718278/GH CSSRM3.24_EN.pdf

https://www.osram.com/ecat/OSLON® Square GH CSSRM3.24/com/en/class_pim_web_catalog_103489/global/prd_pim_device_5516891/

Click to expand...

Ya you're right, it was the SSL not the square. Datasheet says SSL is a little more efficient over the square, though I can't figure how they're arriving at 3.55μmol/J "typ" at 1.47W consumption. Ends up calculating to 5.218μmol/s, but the min μmol/s is listed at 5.24μmol/s. Hmmm... Did you say you had sphere tests?

Square...


SSL...

Osram square is 2mil chip, xpg3 is 2 mil chip. Both ceramic.
These two leds are almost the same...
2% difference? $/umol is the most important parameter here.

Now these datasheets are bullshit... It is made with pulse current at 25°c on bare led so it is not even a PCB efficiency.

Both of these led are top notch.