Why Just A Very Small Portion of 660nm Diodes?

VIPARSPECTRA KS5000 LED grow light adopts the market-leading Samsung LM301H white diodes (792pcs 3000K, 432pcs 5000K ) & OSRAM 660nm red diodes (36pcs). Do you know why just a very small portion of 660nm diodes compared to the white LEDs?



660nm deep red diodes are added to LED grow lights because they are photosynthetically efficient and electrically efficient.

However, they are also relatively expensive compared to white LEDs so only some are added to boost the overall system efficiency but not raise the cost of the fixture too much. 660nm deep red does not affect plant shape or cause flowering to occur.

Red photons are not generally photomorphogenic which means the proportion of them in the overall spectrum does not affect plant shape.

Dear ViparSpectra, what are phytochromes and how do they work?

Prawn Connery said:

Dear ViparSpectra, what are phytochromes and how do they work?

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@Prawn Connery
Phytochromes are a class of photoreceptor in plants.Phytochromes regulate light-induced developmental transitions as well as adaptation to growth under dense canopy. Plant phytochromes have antagonistic and synergistic roles in regulating photoperiodic flowering in Arabidopsis.

ViparSpectra said:

@Prawn Connery
Phytochromes are a class of photoreceptor in plants.Phytochromes regulate light-induced developmental transitions as well as adaptation to growth under dense canopy. Plant phytochromes have antagonistic and synergistic roles in regulating photoperiodic flowering in Arabidopsis.

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So phytochromes trigger photomorphogenic responses in plants, yes?

And what colours are absorbed by phytochromes?

Specifically, which of these is the active protein – Pr or Pfr – and what part of the spectrum triggers it?

Prawn Connery said:

So phytochromes trigger photomorphogenic responses in plants, yes?

And what colours are absorbed by phytochromes?

Specifically, which of these is the active protein – Pr or Pfr – and what part of the spectrum triggers it?

Click to expand...

As far as I know, phytochrome occurs in two reversible conformations (Pr and Pfr), which absorb red light (R) and far-red light (FR) respectively.

Does anyone else know the answer to the questions? Welcome to express your opinion.

Do you care about the quantity of 660nm when buying lamps?

Happy Monday to you all.

ViparSpectra said:

Do you care about the quantity of 660nm when buying lamps?

Happy Monday to you all.

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Do you?

Hollatchaboy said:

Do you?

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I will.

660nm deep red diodes are added to LED grow lights because they are photosynthetically efficient and electrically efficient.