Call: 833.217.4025

PureGreens-Logo in white


Full-Spectrum Grow Lights vs. Sunlight: Which is Best?

Sunlight is crucial for plants as it provides energy for growth. While sunlight contains a full spectrum of colors, most artificial lights typically emit only yellow or green light. However, modern full-spectrum grow lights are designed to mimic sunlight’s spectrum. This blog discusses the importance of light for plant growth, comparing the impact of natural sunlight and artificial grow lights.

How Does Sunlight Affect Plants?

Sunlight plays a fundamental role in the growth and development of plants. Through photosynthesis, plants convert light energy into chemical energy, which is used to synthesize essential nutrients and compounds. 

The full spectrum of sunlight contains various wavelengths, including red and blue light, which are particularly important for plant growth. Red light promotes flowering and fruiting, while blue light supports leaf development. 

Sunlight also helps regulate various physiological processes in plants, such as circadian rhythms and hormone production. Plants in pots growing on a windowsill.

How Are Grow Lights Different?

While sunlight provides the complete range of colors that plants require, many artificial lights fall short of replicating this spectrum. Conventional light bulbs emit yellow or green light, which might not meet plants’ specific needs. 

However, advancements in lighting technology have led to the development of full spectrum grow lights. These specialized lights are designed to closely mimic the wavelengths found in natural sunlight, offering a well-rounded spectrum that supports various stages of plant growth. 

There are even some wavelengths of sunlight that plants can’t intake, enabling grow lights to customize a light spectrum designed for the plants growing under them. 

Do Plants Need Natural Sunlight?

Plants can grow using only artificial grow lights, given that the light spectrum adequately meets their requirements. Full-spectrum grow lights, with their ability to provide the necessary red and blue wavelengths, can sustain plant growth and development. 

However, it’s essential to consider the intensity and duration of light exposure. While grow lights offer controlled climate conditions and extended periods of light, natural sunlight remains more powerful. Plants grown under sunlight receive sunlight for around six to eight hours each day, while they can sit under grow lights for 10 to 12 hours. 

In cases where using only grow lights is necessary, it’s crucial to closely monitor plants and adjust light settings to ensure optimal growth.

Grow Lights and Precise Farming

Indoor or vertical farming involves growing crops in controlled environments using hydroponic methods. In such settings, where natural sunlight might be limited or undesired, grow lights play a pivotal role. 

By strategically placing full spectrum grow lights, farmers can provide consistent light exposure to crops regardless of external conditions. This approach allows for year-round cultivation, faster growth rates and the potential for higher yields. 

Additionally, by adjusting the light spectrum, intensity and duration, farmers can tailor the lighting conditions to the specific needs of different crops, optimizing their growth and quality. 

Hydroponic lettuce growing under grow lights.
There isn’t an easy answer to whether grow lights or sunlight is preferable for your plants. However, grow lights are able to replicate the full spectrum of sunlight, enabling production of indoor crops despite local climate conditions.

3 Key Benefits of Pure Greens Container Farms

Grow lights are an incredible technology, but they’re only as effective as the climate around them. If adequate airflow isn’t maintained, grow lights can heat a space quickly. 

Pure Greens Container Farms are secure indoor farms that house automated hydroponic systems in a steel shipping container shell. High-powered air-conditioner units keep the inside temperature stable and comfortable for plant cultivation. 

In addition to climate control, container farms have many other benefits for growers interested in hydroponics:

1. Turnkey Systems

Pure Greens Container Farms streamline your journey into indoor farming. With automated hydroponic systems and climate control, these fully equipped units arrive ready to use. 

By choosing a turnkey container farm, you’re opting for a comprehensive solution that minimizes the hassle of piecing together various elements. This convenience is particularly beneficial for newcomers to hydroponics and vertical farming, and for businesses looking to expand their agricultural ventures swiftly. 

The turnkey model ensures that from day one, you can focus on cultivating your crops and optimizing growth parameters without being mired in complex setup processes.

2. Portable and Secure

Pure Greens Container Farms offer a revolutionary concept in agriculture with their portable solutions. These container farms bring mobility to farming, enabling you to cultivate crops anywhere you need. 

While we don’t recommend moving crops mid-growth, you can move your compact container farm from place to place between growing seasons. This enables growers to cultivate in-demand crops for specific markets.

Whether you’re addressing food deserts, conducting research, or engaging in educational endeavors, the portability of these farms opens doors to agricultural possibilities in unconventional locations. With controlled environments and efficient resource usage, these portable container farms redefine how we think about farming’s geographic limitations.

3. Customizable

Pure Greens Container Farms offers custom options that cater to your specific growing needs. Whether you’re an experienced grower with precise specifications or a researcher pushing the boundaries of agricultural innovation, these container farms can be tailored to suit your objectives. 

From adjustable grow lights to configuring the layout for optimal space utilization, the customizable nature of these farms provides a canvas upon which your agricultural ambitions can unfold. This flexibility also supports experimentation with different crops and growth techniques, encouraging you to continuously refine your hydroponic skills. 

With a range of possibilities at your fingertips, you can transform each container farm into a unique cultivation hub tailored precisely to your vision.


Both grow lights and sunlight offer plants the energy they need to develop. They provide light energy, which plants use to synthesize essential nutrient compounds necessary for growth.

Grow lights are helpful in situations where outdoor space is limited or when plants have specific light preferences. They control light intensity and placement, protecting plants from extreme temperatures. In regions with limited sunlight, grow lights ensure consistent year-round light availability. 

To learn more about container farms or growing plants hydroponically, contact us for more information. 

Related Blogs