Types of Grow Lights for Weed

Grow Lights for Weed

Table of Contents

The legalization of marijuana in numerous states for both recreational and personal use has been considered across the different states. This also includes weed growth, regardless if it is for business or personal use. With the idea of growing at home, there is a need for investing high-quality equipment, especially for indoor growing marijuana. One of the most important keys to successful indoor-grown marijuana is the grow lights. 

In this post, you will know more about what should be the requirements needed in choosing the suitable marijuana grow lights as well as the advantages and disadvantages of its different types. Considering that there are different mediums used, such as hydroponics, soil, SoG, and others, as a grower, you need to know what’s best for the nourishment of the weed. Read on and know more about the types of grow lights for weed grow setup. 

What are the Grow Light Requirements?

Considering that grow lights are an alternative to natural sunlight, you have to be wary of the lighting needs of marijuana. They play an important role in the process of photosynthesis, as well as the energy conversion process. Before choosing a grow light, here are three things to be considered. 

Light Intensity

The intensity of light is also known as brightness. The brightness is held responsible for identifying how much light can be and should be absorbed by the marijuana plant. It is often measured in Lumen. For low intensity grow lights, they have the ability to produce long plants because of the minimal amount of light absorbed and are often not evenly distributed. On the other hand, lights with high-intensity produce results of buds that are compact, dense, and heavy in yield. 

Grow Light Cycle

Since marijuana comes in different strains, which means they require different light cycles. When they undergo the vegetative stage, they require long hours exposed to light compared to when they reach the flowering stage. Grow lights usually come with timers that help in managing the light cycles.  

Light Color

The thing about marijuana plants, they require more blue light, especially during their vegetation stage. Once they reach the flowering stage, the plant needs red light more. The waves of the red light tend to be longer than the blue waves possessing more energy. 

3 Types of Grow Lights for Weed

There are three common types of grow lights for weed in which they vary in cost, lumens, and other specifications. These factors will help you identify what type of grow lights to choose. In this section, LED grow lights, Fluorescent grow lights, and HID grow lights are defined together with its advantages and disadvantages. 

LED Grow Lights

LED lights are known for their high lumens per watt content than other types of lights. It’s one of the cheapest types of light, especially when it comes to energy consumption. They are pretty good at inducing light penetration and intensity even with the most demanding growing requirements of marijuana plants. This is actually perfect for marijuana plants requiring loner hours of utilization. It may be quite a bigger investment as compared to fluorescent and HID, but LED grow lights go a long way during the marijuana plant’s growth. 


  • Efficient usage. 
  • Low energy consumption. 
  • Low operating cost. 
  • More spectra control.
  • They don’t run hot. 
  • Easy to operate. 
  • They have a longer lifespan. 
  • They produce more light without compromising the costs. 
  • LED barely produces heat during usage. 


  • The initial costs are high. 
  • The quality of LED is sometimes not maintained by manufacturers. 

Fluorescent (CFL) Grow Lights

Fluorescent grow lights are known as CFL or Compact Fluorescent Lamp. They are the transitioning light, which is a better version of the traditional incandescent lamp. This light type is actually invented by Thomas Edison after failing over 10,000 times. 

They may produce these bright and full-spectrum lights, yet they produce 90% heat and 10% light, which is quite a waste of energy. Compared to the classic incandescent bulbs, these fluorescent grow lights last 10 times longer. Plus, they also consume lower wattage as compared to the incandescent bulbs, but they tend to deliver the same amount of lumens. 


  • It’s an inexpensive investment. 
  • They are available almost at every store. 
  • Fluorescent saves more space. 
  • They produce lower heat compared to incandescent. 
  • They work well with standard sockets. 
  • Light colors available are perfect for the stages of the growth of marijuana. 


  • Turning them on and off can shorten the lifespan of the bulb. 
  • When the light is not used with a dimmer, they can quickly burn out. 
  • CFLs are preferable for ambient lighting rather than narrow beams and spotlights.
  • They contain mercury. 
  • CFLs are temperature sensitive, considering that they can produce lower light levels due to low temperatures. 

HID Grow Lights

HID grow lights are also known as High-Intensity Discharge lights. They are popular for their amazing light production and brightness. Those who use HID are often from the biggest commercial industries considering that they are designed for heavy-duty utilization. 

HID grow lights are widely used among indoor-plant cultivation in order to support their sunlight needs. There are a variety of lighting systems that can be designed with HID grow lights. This is actually perfect for growers and distributors of marijuana because with the use of HID, they produce higher yields of buds to consume. 


  • They are a much cheaper investment compared to CFL and LED grow lights.
  • HID grow lights produce higher yields of weed buds. 
  • They constitute pretty low investment costs. 
  • They can be used for a full-grown cycle. 
  • Stimulates the production of resin and trichomes. 


  • They require frequent changes. 
  • HID grow lights should be placed higher. 
  • They come with a complex cooling system. 


In conclusion, there is a variety of grow lights available. And as a grower, you have to be wary of the pros and cons of these grow lights in order to choose what’s best for your marijuana plants. The best thing to do first is to study the growth patterns of the marijuana strains prior to choosing the best equipment to invest in. Plus, there is a variety of types of grow lights for weed to choose from that will surely satisfy the needs of your plants. 

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