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Red and Blue light are best for plant growth because those two wavelengths are what chlorophyll respond to.

.............if this is tru y not use a black light................it emits purple light

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13y ago
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11y ago

Plants are effectively able to use Violet/ Blue light between 400 and 475 nanometers (wavelength) and Red light between 650 and 700 nanometers (wavelength) - which are absorbed by chlorophyll a and chlorophyll b.

Green light which falls within the 475 to 650 nanometers wavelength, is not used as much as chlorophyll is green in colour and reflects these wavelengths. However, Carotenoids are a group of accessory pigments which occur in all photosynthetic organisms. They contain about forty carbon atoms, often without oxygen atoms and are fat soluble. They are chemically unrelated to chlorophyll and consist of rings connected by long chains of carbon atoms. They absorb light maximally at wavelengths between 460 and 550 nm and are therefore yellow, red or orange in colour as they reflect the wavelengths in this part of the spectrum. Carotenoids are found in all photosynthetic organisms.

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14y ago

The 'blue' wavelength is essential for vegetative growth, and the 'red' wavelength is crucial for flowering/bud growth.

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9y ago

blue - violet light should be used. Violet light is near the end of the visible light spectrum because it has a very low wavelength.

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7y ago

Most of the visible light spectrum except green wavelengths is absorbed by the chlorophyll molecule and is usable in photosynthesis as a source of energy for plants.

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8y ago

Not every plant wants the same color of light. Red and blue light are the most commonly used. The sun gives off a rainbow of colors.

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14y ago

red/orange and violet

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14y ago

every thing except green

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Q: What wavelength is the most beneficial for plant growth?
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