Why Can’t We Use Just Red or Just Blue LEDs to Grow Plants?

Why should we use a combination of red and blue light? Why can't we use only one of them?

Even though red light is the most effective for photosynthesis, red light alone would cause poor growth in plants, such as overly elongated stems, so blue light is added to keep plants compact and in a more typical shape.

On the other hand, plants cannot be grown only in blue light because this would have a negative impact on their growth and development. Over the years, researchers have discovered that a mix of high red light and a low percentage of blue light is best for the yield of plants that already receive light from the sun.

MORE: Red and Blue Light: The Ultimate Guide

What Others Are Asking

How to Avoid Burning Your Plants?

My plants seem to have been burned by light or heat. I am very concerned about the health of my plants, so I want to know how to avoid burning plants so they can thrive.

Read Detailed Advice From Blog Articles

Indoor growth of hemp
Scott Hughes

What Is LED Grow Light?

The LED grow light is an artificial light source that uses LED as the luminous body to meet the lighting conditions of plant photosynthesis. It has

Read More »
Scroll to Top
Scroll to Top