I think you will be pleased with the results.
I could find no information on an HLG QBX board
I assume they are using the LM561B Plus for the 90 CRI.
This is why I thnk you will be pleased.
While the LM561B CRI 90 is only 25 lm, 130 lm/W, where the LM561C is 37 lm, 170 lm/W, it should do a better job flowering.
Red is the best wavelength for photosynthesis.
An LM561 in general will put out the same number of photons.
A 90 CRI will significantly lower the lm/W.
It will not have a significant effect on the PPFD.
A 3000K CRI 90 will peak at about 625nm (red).
A red photon contributes significantly less to lumens.
In the SPD you can see the peak is shifted left from the typical yellow to red.
Less green and yellow, more red.
the biggest mistake growers make when selecting an LED is to rely too heavily on the lumens rather than spectrum.
Why 170 lm/W looks so much better then 130 lm/W, that may not be the case.
In a particular LED series the same deep blue LED is used for all CCT and CRI.
the difference is the phosphor covering the LED.
The phosphor is a wavelength converter.
It does take more energy to convert blue to red than blue to green. So there is some loss.
But by far the biggest factor is the lumen to PPFD conversion.
If you convert a green photon to lux it gets multiplied by 147.
If you convert a red photon to lux it get multiplied only by 7.5.
And then the in between wavelengths are somewhere in between.
The point being a lower lm/w does not mean less photons. Not proportionately less in the same LED series.
Source: http://www.growlightresearch.com/ppfd/convert.html
