Most efficient chip

Olive Drab Green said:

Yeah, but PPFD goes up significantly. My 3500k 80CRI CXB3590s driven at 2150mA put out ~100 less PPFD than my 90 CRI 3500k Vero29C (Seventh Gen) driven at 1670mA.

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Is that calculated or measured with a meter?

PetFlora said:

~ 5 years ago- a life time in LED knowledge, a person who long since stopped posting added some great intel to my then thread. The highlight of which has to do with the extreme value of 630nms. So for whatever this is worth...

As one can see, the CREE Neutral White (I call it 'Goldilocks', because it's almost 'just right'

) has a RSPD that still allows nearly ~25% of its total power in the blue range (and plants only really 'need' ~8-10%), and more than 1/3 of which (i.e. the area under the curve) is over ~580nm or so (which has a Photosynthetic RS of over 90%!) - which is much better than even your typical 'Enhanced HPS'.

Couple that with strong white light (green-response chlorophyll extending throughout and deep into leaf structures, with a net effect at or near that of the (mostly) surface-level blue and reds), which also takes care of most of the ~660nm+ you actually need for photomorphogenesis - and you can get by with 630nm reds just fine.

(i.e. 630nm red is ~95% of the PSR of 660nm, AND they currently still have ~20-30% greater radiometric efficiency - as well as being cheaper than the deep reds - so there's more 'bang for the buck'):
Something like that would probably meet the needs of ~95% of today's growers.

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Thanks for sharing that!!

Stephenj37826 said:

Is that calculated or measured with a meter?

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18x18 per emitter.

Olive Drab Green said:

18x18 per emitter.

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What meter?

Stephenj37826 said:

What meter?

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Ask @Rahz, he'd know better than me.

What does finish sooner mean???
More ambers, receded pistils, swollen bracts????

1) More ambers...OK...so harvest plants the same day... dry, cure, and trim. Then lab test. Compare final weight(accumulation of biomass over time) and also compare THCa : THC∆9 : CBN. If it did finish sooner it should have more chemical degradation. Or is ripper will have higher values from being peak content.
2) Receded pistils- pics of comparison buds on same days from similar flower location. Comparative pistil length.
3) Swollen Bracts- pics of bracts on same days from similar flower location. Calibrator for diameter measurements.

@Stephenj37826 Doesn't even grow buds, he's going off what he sees from some guy on a forum...this isn't in any means scientific or accurate it's anecdotal at best.