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Yeah that seems odd to me. Chlorophyll largely doesn't do anything with 500-600nm wavelengths, and that's where this LED outputs a lot of energy. If this was a

Yeah that seems odd to me. Chlorophyll largely doesn't do anything with 500-600nm wavelengths, and that's where this LED outputs a lot of energy. If this was a bulb that could switch between red and green that might be useful for dealing with day/night cycles for plants, but this LED seems like it just outputs more green light than normal?

scrumbledober 4y ago
A graphic on the page notes that these are designed to be used with red 660nm bulbs. A lot of current grow lights are white, blue, and red bulbs. It seems these are aiming to create the blend of blue and white so manufacturers can blend them with red without worrying about the white/blue mix.
tiagod 4y ago
Sensitivity of Seven Diverse Species to Blue and Green Light: Interactions with Photon Flux https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0163121 https://journals.plos.org/plosone/article?id=10.1371/journal... >In contrast to the significant effects of blue light, increasing green light in increments from 0 to 30% had a relatively small effect on growth, leaf area and net assimilation at either low or high PPF. Surprisingly, growth of three of the seven species was not reduced by a treatment with 93% green light compared to the broad spectrum treatments. Seems like green light is not useful for all cases, but I would indeed like to know exactly why that's the case.
- jakedata 4y ago
  It's possible that some green light improves aesthetics.
- deleted 4y ago
  [deleted]
- Nomentatus 4y ago
  There's too much green light in sunlight, so to reduce free radical formation, most plants reflect most green light (something you may have noticed.) Converting light into chemical changes (splitting water, then sugar) without causing a lot of damage from free radicals is not trivial.
  - another2another 4y ago
    >most plants reflect most green light (something you may have noticed.) Subtle !
    - Nomentatus 4y ago
      A joke on myself, too. I swear our associative minds, knowing that peeps who wear green clothes and buy green cars, like and want more green; decide plants aren't rejecting green light (the obvious physics) but that they must want, love and use green light. An error I made myself until fairly recently.

scrumbledober 4y ago

A graphic on the page notes that these are designed to be used with red 660nm bulbs. A lot of current grow lights are white, blue, and red bulbs. It seems these are aiming to create the blend of blue and white so manufacturers can blend them with red without worrying about the white/blue mix.

tiagod 4y ago

Sensitivity of Seven Diverse Species to Blue and Green Light: Interactions with Photon Flux https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0163121 https://journals.plos.org/plosone/article?id=10.1371/journal... >In contrast to the significant effects of blue light, increasing green light in increments from 0 to 30% had a relatively small effect on growth, leaf area and net assimilation at either low or high PPF. Surprisingly, growth of three of the seven species was not reduced by a treatment with 93% green light compared to the broad spectrum treatments. Seems like green light is not useful for all cases, but I would indeed like to know exactly why that's the case.

jakedata 4y ago
It's possible that some green light improves aesthetics.
deleted 4y ago
[deleted]
Nomentatus 4y ago
There's too much green light in sunlight, so to reduce free radical formation, most plants reflect most green light (something you may have noticed.) Converting light into chemical changes (splitting water, then sugar) without causing a lot of damage from free radicals is not trivial.
- another2another 4y ago
  >most plants reflect most green light (something you may have noticed.) Subtle !
  - Nomentatus 4y ago
    A joke on myself, too. I swear our associative minds, knowing that peeps who wear green clothes and buy green cars, like and want more green; decide plants aren't rejecting green light (the obvious physics) but that they must want, love and use green light. An error I made myself until fairly recently.