Do Grow Lights Need to be Purple?

Wayne Taylor
Written By Wayne Taylor

The Basics of Grow Lights

Indoor gardening, urban gardening, and vertical farming all rely on grow lights to provide the right amount of light for plants to grow. Grow lights are artificial lights that provide light in a spectrum similar to that of the sun, which allows plants to thrive indoors.

Grow lights come in different types, including fluorescent, LED, and high-intensity discharge (HID). Each type of grow light has its advantages and disadvantages, depending on what you want to grow and your budget.

However, you may have heard that grow lights need to be purple, but is that true? Let’s dive into the science behind grow lights and the role of the purple color.

What is the “Purple Light” Myth?

The “purple light” myth comes from the fact that LED grow lights often emit a purple light. This is because these lights use a combination of red and blue light to mimic the spectrum of sunlight.

However, the purple color is not necessary for plant growth. In fact, plants can grow under any spectrum of light as long as it has the right intensity and duration.

Moreover, a full spectrum of light, including green and yellow wavelengths, can be beneficial to plants. These wavelengths are absorbed by plants and contribute to photosynthesis and growth.

The Importance of the Right Spectrum

While the purple color is not necessary for plant growth, the right spectrum of light is crucial. Different types of plants require different wavelengths of light to grow and thrive.

For example, plants that are in their vegetative stage require more blue light, while those in their flowering stage require more red light. Therefore, it is essential to choose a grow light with a spectrum that fits the specific stage of growth of your plants.

Other Factors to Consider

Apart from the spectrum of the light, there are other factors to consider when choosing a grow light, such as the intensity and duration of the light.

The intensity of the light refers to the amount of light that plants receive. Different plants have different light requirements, and it is essential to choose a grow light with the appropriate intensity for your plants.

The duration of the light refers to the number of hours of light that plants receive. Again, different plants have different light requirements, and it is essential to choose a grow light with the appropriate duration for your plants.

Conclusion

In conclusion, the purple color is not necessary for plant growth. While LED grow lights often emit a purple light, the right spectrum of light is essential for plant growth and varies depending on the type of plant and stage of growth.

When choosing a grow light, it is essential to consider the spectrum, intensity, and duration of the light to ensure that your plants receive the right amount of light for optimal growth.

Remember, the key to successful indoor gardening, vertical farming, and urban gardening is to understand the specific needs of your plants and provide them with the right environment to thrive.

Additional Tips

  • When choosing a grow light, consider the size of your indoor garden, as some lights are better suited for small spaces than others.
  • LED grow lights are more energy-efficient than other types of grow lights and can save you money on your electricity bill.
  • Make sure to place your grow light at the right distance from your plants to prevent burning or stunting.
  • Use a timer to ensure that your plants receive the right amount of light each day.