Why just a very small portion of 660nm diodes?

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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?

Why just a very small portion of 660nm diodes


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.
 
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