How Do Different Colors of Light Affect Plant Growth?

Although common grow lights emit blue and red light, these lamps come in many different color combinations. Because each color has different effects on the plant. So, what color light is useful in plant growth?

How Do Different Colors of Light Affect Plant Growth?
13.10.2021
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Although common grow lights emit blue and red light, these lamps come in many different color combinations. Because each color has different effects on the plant.

The color of light is determined by the wavelength of the light. Lights are used in a wide range from 380 nm to 840 nm in plant growth. This range extends from ultraviolet lights to deep red lights. So, what color light is useful in plant growth?

Ultraviolet lights, which correspond to the range of 380 nm – 390 nm, guide the flowering of plants.

Violet blue lights, which correspond to the 400 nm – 410 nm range, support the green leaf development of the plant.

Blue light, corresponding to the 440 nm – 460 nm range, promotes root growth and green leaf growth.

Yellow light, corresponding to the 585 nm – 595 nm range, improves taste by increasing nutrient content and trace elements.

Orange light, which corresponds to the 600 nm – 610 nm range, increases root and leaf quality and improves fruit flavor.

Red light, which corresponds to the range of 660 nm – 670 nm, supports the photosynthesis and photoperiod of the plant.

Dark red light, which corresponds to the range of 730 nm – 840 nm, increases the growth and flowering performance of the plant, thus increasing the yield.

As seen above, many different colored lights are used by plant growers to change the growth rate of the plant, the taste, color and many other characteristics of the fruit and leaf.

If you want to design a grow light, you can choose your order of priority and create a combination of the above colors.

Emre Yılmaz, the founder of Lighting Portal, graduated from Atılım University Department of Electrical and Electronics Engineering in 2013, and since then has been involved in the management and product development activities of state-supported projects in the lighting industry. He completed his master's degree at Gazi University Industrial Design Engineering Department and continues his education in the doctorate program of the same department.
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