Number of Diodes vs appropriate spectrum?

MrToad69

Well-Known Member
Hey gang..
I'm assuming this is a no brainer, but figured I'd ask to confirm...

I'm considering the HLG options: QB 120 vs the QB 132..
I want something that I can scale up/down hence the modular approach..get a bunch of these.

The QB 132 has 132 led's..3000k, while I can get a
More appropriate spectrum on the QB 120 (3500k) but it has fewer lights (120)..

Any opinions...? More lights (which I assume) or more appropriate spectrum?

cheers
 

SDS_GR

Well-Known Member
Why the 3500K 80Ra pcLED spectrum
is more appropriate than 3000K 80Ra ?
In what way(s)?

BTW, me thinks that +/- 12 pcs of LED devices per board won’t make THE difference neither at efficiency ,neither at spatial output distribution (“spread”) .
 
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MrToad69

Well-Known Member
Just the assumptions Ive made from what I've read..obviously some differing perspectives out there...

Which boards would you choose?
 

MrToad69

Well-Known Member
 

SDS_GR

Well-Known Member
Yeap,I think I'm quite aware of the meaning of contents of the artricle you've posted.
Still ,we use them either for ease of expression
(for example when someone says PC LED 3000K 80Ra ,I can picture inside my head exactly what output spectrum he means )
or
because we can actually use them and convert them into more appropriate units with pretty small error margin
(for example the previous someone says that he has measured 150 .000 lm at his grow tent directly beneath his light .
Again ,by multiplying the 150.000 lumens figure with the magic number of 0.0145 -valid only for every pc LED spectrum 3000K 80Ra - I can
calculate the PPF of that exact measurement spot to be about 2,175 umols/sec .For sure he has to raise his light a tad,if he aims to grow with it ....) .
 
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