Resource icon

CFL Lights and Growing Cannabis

What are Compact Fluorescents Cannabis Grow Lights

Cannabis cultivation has become increasingly popular in recent years, both for medical and recreational purposes. One of the primary factors in successful cannabis growth is the type of lighting used. In this article, we will discuss the benefits of using Compact Fluorescent Lights (CFLs) for growing cannabis and how to optimize their use for maximum yield.

What Are CFL Lights?​

CFL lights are a type of fluorescent light that is designed to be more energy-efficient and compact than traditional fluorescent tubes. They have become a popular choice for indoor growers due to their affordability, accessibility, and low heat output.

Advantages of Using CFL Lights for Cannabis Cultivation​

CFL lights offer several benefits that make them a suitable choice for growing cannabis indoors. Here are some of the main advantages:

Energy Efficiency​

CFLs are known for their energy efficiency, consuming less power than other types of grow lights, such as High-Pressure Sodium (HPS) or Metal Halide (MH) lights. This means that CFLs can help lower your electricity bill, making them an economical choice for small-scale growers.

Low Heat Output​

CFLs produce less heat compared to other grow lights, which is especially beneficial for cannabis plants. Excessive heat can lead to issues like heat stress, nutrient deficiencies, and reduced yields. The low heat output of CFLs makes them suitable for growing cannabis in smaller spaces or in environments where temperature control is a concern.

Flexibility and Accessibility​

CFL lights are widely available and come in various sizes and wattages, making them a versatile option for growers with different space and budget constraints. They can be used in small grow tents, closets, or cabinets, providing flexibility in terms of setup and configuration.

Choosing the Right CFL Lights for Growing Cannabis​

When selecting CFL lights for your cannabis grow, consider the following factors:


The wattage of the CFL light will determine its light output and energy consumption. Higher wattages generally produce more light, which is essential for cannabis growth. However, they also consume more power. Aim for a balance between sufficient light output and manageable energy consumption. A good rule of thumb is to use at least 100 watts of CFL lighting per square foot of growing space.

Color Temperature​

CFL lights come in different color temperatures, usually measured in Kelvins (K). For cannabis cultivation, it's essential to use lights with the appropriate color temperature to support the different growth stages. Cool white CFLs (around 6500K) are ideal for the vegetative stage, while warm white CFLs (around 2700K) are better for the flowering stage.

Reflector Hoods​

To maximize the efficiency of your CFL lights, use reflector hoods. These help direct the light towards the plants, reducing light waste and improving the overall light coverage.

Tips for Using CFL Lights in Your Cannabis Grow​

Here are some best practices to help you get the most out of your CFL lights:

  • Position the lights as close to the plants as possible without causing heat stress. CFLs have a low heat output, allowing them to be placed closer to the plants, ensuring they receive adequate light.
  • Regularly rotate your plants to ensure even light distribution. This will help prevent certain areas of the plant from receiving less light, which could lead to uneven growth.
  • Monitor the temperature and humidity of your grow space. Although CFLs produce less heat than other grow lights, it's still essential to maintain optimal conditions for cannabis growth.
  • Replace your CFL bulbs as needed. Over time, the light output of CFL bulbs will degrade, reducing their effectiveness. Replace them regularly to ensure consistent light quality for your plants.


CFL lights can be a suitable choice for growing cannabis indoors, particularly for small-scale growers or those with limited budgets. Their energy efficiency, low heat output, and versatility make them an attractive option for many. By choosing the right CFL lights and following the best practices mentioned above, you can successfully grow cannabis using CFL lighting.
  • Like
Reactions: 4EL2
First release
Last update
4.00 star(s) 1 ratings

More resources from logic

Top Bottom