Best LED Grow Lights for Growing Cannabis Indoors: Our Guide

Many people desire to grow their cannabis to save money and enjoy the freedom of experiment. Light is one of the essential elements that a cannabis plant needs. 

Plants turn light energy into chemical energy when going through the photosynthesis process. In turn, this allows them to grow strong and healthy. Light fuels bud production in cannabis. When you plan to grow cannabis indoors, grow lights can help you to have quick harvest cycles. 

In this guide, we will look at some of the most popular LED grow lights for growing marijuana to help you in the decision-making process. We have tested these grow lights and found them to be reliable in marijuana cultivation. Let’s dive in!

Best LED Grow Lights for Those Who Want to Grow Cannabis

When choosing LED grow lights for indoor plants, you need to determine the plant that you would like to grow and the surface area. With that in mind, let’s look at some of the best full spectrum LED grow lights:  

T5 LED Grow Lights

Whether it is for part-time or full-time use only, T5 LED grow lights can help in the growth of your cannabis plants. Regardless of the amount your plants need at each stage of growth, you’ll undoubtedly find that they have adjustable features. These lamps are often available in various sizes from 2 to 4 feet. They weigh between 10 and 30 pounds or over. 

 T5 LED Grow Lights
T5 HO Grow Light – 4 FT 8 Lamps

Mars Hydro LED Grow Light

Mars Hydro LED Grow Light is one of the most powerful LED options that are ideal for cultivating cannabis indoors. Mars hydro provides plants with 1000w. This unit assures you around a 30% higher yield on your cannabis plants. Additionally, there are about 343 LEDs present on this grow light, which makes it perfect for up to 3 x 3 plant areas. 

Mars Hydro LED Grow Light
MARS HYDRO FC3000 LED Grow Light 3x3ft

Spider Farmer Sf-2000 LED Grow Light

With a low power consumption, Spider Farmer Sf-2000 LED Grow Light is ideal for all growth stages. The grow light offers high safety performance, and it doesn’t put out a large amount of heat. It also comes with high-quality protective covers for cables. What’s more? It can deliver light up to a coverage of 2 x 4 and features a knob that allows you to control the LED light intensity. Spider Farmer Sf-2000 LED Grow Light can help your cannabis plant to produce high yields

Spider Farmer SF-2000 LED Grow Light
Spider Farmer SF-2000 LED Grow Light

Giixer LED Grow Light

When you compare it with the usual 1000 watt grow lamps, Giixer LED Grow Light comes with larger, brighter, and efficient Dual-Chips 10w led lights. It is cost-efficient, as it only consumes 110 watts while delivering a high capacity power output. You have the option to choose between the Veg and Bloom settings by the press of a double switch. This unit has a 50000-hour life cycle before needing replacement.

Giixer 1000W LED Grow Light
Giixer 1000W LED Grow Light

Juhefa LED Grow Light

With a sleek, black appearance, the Juhefa LED Grow Light features five levels of brightness. Running on a 25w power capacity, this LED grow light has a 1 x 0.39-foot coverage area. 

If you want it to cover a larger area, you have no option but to use several grow panels. The best part is: This LED unit operates at a low cost that is favorable to many people.

Juhefa Professional Full Spectrum Grow Light
Juhefa Professional Full Spectrum Grow Light

KingLED 1200W Double Chips

The KingLED 1200W Double Chips have an impressive design for growing cannabis indoors. They come with 10W Double Chips, making them brighter and efficient than traditional LEDs. Additionally, this unit maintains the balance between the lumen output and total coverage. It is long-lasting and has an average operating cost. The KingLED 1200W double chips are also easy to install and get the job done at a fair energy consumption rate. 

KingLED Newest 1200w LED Grow Lights
KingLED Newest 1200w LED Grow Lights

Can I Leave My Grow Lights on the Whole Day?

No. It’s not advisable to leave grow lights round the clock, as this will force your plants to grow fast. As such, you need to keep your grow light on for around 12 to 18 hours. Keep in mind that too much light in different growth phases could interrupt the plant’s natural process of dormancy and growth.

The Main Difference Between LED Grow Lights and LED Lights

LED lights can only provide illumination to plants. LED grow lights, on the other hand, provide a wider spectrum of blue and red light that a plant requires during the growth and flowering stage. 

We recommend that farmers use suitable LED grow lights. This is because they provide cannabis plants with the right colors. This is important since they need the lights for growing into healthy plants. 

Difference Between LED Grow Lights and LED Lights
The Main Difference Between LED Grow Lights and LED Lights

Blue light is necessary for plant growth. The green coloring matter in leaves absorbs blue light in the atmosphere. The plant later converts it into energy through photosynthesis. 

Effects of Blue lights on Cannabis Plants

Blue light gives plants robust lateral growth. Plants with a spectrum rich in blue light tend to have darker leaves. This is ideal for the flowering period. Low exposure to blue light levels causes cannabis plants to develop a shade-avoidance. This syndrome causes the plants to stretch and seek blue light away from the shade. 

When plants have a high green: blue light ratio, they will think they have shade over them. This makes it important to include blue light as one of the colors in the broad-spectrum light. Additionally, plants that lack enough blue light will grow longer shoots. This is a way of getting exposure to blue light. If there is no sign of blue light, the cannabis leaves start to exhibit leaf hyponasty. This is not a good sign, especially if you grow your cannabis indoors

Effects of Blue lights on Cannabis Plants
Cannabis plants under blue lights

When cannabis isn’t getting enough blue light, it’ll compete for light exposure. It achieves this by growing longer shoots. Lack of enough blue light causes the plant to develop an inefficient root system. This root system cannot support the entire plant’s nutrition. Also, blue light regulates the opening and closing of stomatal pores.

Gas exchange is critical since it brings in carbon dioxide gas. CO2 is necessary for the photosynthesis process. Therefore, you need to include some blue light when you provide cannabis plants with light. The bottom line is: Blue light cannot be as effective as when you combine it with red light. 

Get Amazing Seed Deals

  • Feminized Seeds
  • Autoflower Seeds
  • High THC Seeds
  • High Yield Seeds
  • Beginner Seeds


To summarize, LED grow lights allow your cannabis plants to be high-yielding and healthy when grown indoors. You don’t have to worry about how you will provide your plants with the right spectrum exposure. 

Ready to get cannabis seeds to start growing marijuana indoors? You can head over to ILGM, where you’ll find high-quality cannabis seeds. We have a variety of strains with different THC and tastes to suit your needs.

Some of the cannabis strains available include White Widow Feminized, Bruce Banner Autoflower, and Purple Kush Autoflower. What’s the best part? In case of damage to the seeds you order, we’ll replace them. All products on our site come with a guarantee.

Leave a Comment