best led grow lights

5 Best Full Spectrum LED Grow Lights in 2021(Update January 2022)


Plants need the sun. Beyond water and some good dirt, it is the essential element of a plant’s growth life cycle. However, not everyone has a suitable climate for growing plants. Either that or you want to grow year-round instead of only in the spring and summer.

Indoor growing operations have become standard for those of us with green thumbs and no tropical climate. A greenhouse or sealed room can still nourish and grow flourishing plants with artificial light

LED grow lights are great for indoor operations that want to save on traditional lighting. Anything with a bulb will run a much higher electric bill. Did you know that there’s an even better version of an LED?

Full Spectrum LED grow lights (also known as FS LED grow lights) allow plants to receive even more beneficial sunlight to keep them healthy and growing big and strong.  

What Does Full Spectrum LED Lighting Mean? 

To understand full-spectrum lighting, you first need to know how light works. Light exists on a wave spectrum. Depending on the length of those waves, we get different colours. That’s how rainbows are formed when rain and the sun split the light into its full visible light spectrum.

However, there are other parts of the spectrum we can’t see, infrared and ultraviolet light. Some LED lights exist on a small piece of this spectrum. These LED’s are known as narrow spectrum LED’s and can only display blue or red lights. 


Grow lights LED for plants should come as close to the sun’s light as possible. The narrow-spectrum LEDs don’t even come close to that. Instead, use a full spectrum LED, which displays white light and reaches all ends of the light spectrum. They are the best grow lights for plants. 

Growers are adopting these lights because they’re easier on the eyes in an enclosed operation. Also, they display a broader range of lights shades on your crop throughout the entire growing process. 

Research shows these different ranges of light can be more beneficial than we initially thought. Green, for example, has recently been found to play an important role in photosynthesis. The energy in the far red region has been linked to the growth of stems and leaves.

It’s better to give your plants this full range because they might miss out on something they would have received from the sun. 

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Top 5 FS LED Grow Lights

Below you’ll find a list of the top five full spectrum LED g lights for your plants.

Product NameSpectrum EnergyCanopy Size
#1: ViperSpectra XS4000TBC

#2: Spider Farmer: SF-2000TBCTBCTBC
#3: Mars Hydro: TSW 2000WTBCTBCTBC
#4: Vivosun: 1200W Cree COBTBCTBCTBC
#5: Optic LED Grow Lights: Slim 500STBCTBCTBC

#1 ViparSpectra: XS4000

Size: 39.7” x 11.8”  x 3.0”

ViparSpectra is one of the best LED grow lights because of its integrated Samsung LM301B Diodes. These diodes can increase your crop output by 50% when upgrading from regular purple-coloured LED lighting. 


ViparSpectra also has graphs indicating the spectrum of their lights, and this model reaches from 400 nm to 760+nm, which is well within the full spectrum range. You’ll get every colour. 

The lights also have an easily adjustable brightness scale which doesn’t require any tools. You’ll control the lights in your room from one remote control. They consume only 0.15 kWh per hour which is much less than other FS LED models. 

Cheaper Option: XS1500 

Size: 14″ x 10.8″ x 3.0″ 

If you’re in love with ViparSpectra but can’t afford the bigger model, then the XS1500 will get the job done. It might be smaller, but it has the same efficacy as the XS400 at half of the price. For smaller grow operations, this can be the ideal light. 


  • Samsung diodes equal larger yield
  • Wide spectrum
  • Easily adjustable brightness
  • Low energy consumption


  • Expensive
  • Different coverage for vegging and flowering

#2 Spider Farmer: SF-2000

Size: 25″ X 10.5″ X 2.3″ 

The Spider Farmer SF2000 boasts its ability to create higher-quality yields at a lower running cost. Most FS LEDs only operate with a blue light behind a phosphor coating. 


The Spider Farmer SF-2000 has both red and blue LEDs behind its coating to make the spectrum even fuller, making it ideal for growth at all stages. 

Quality takes priority at Spider Farmer. All of their lights have proper waterproofing and a sturdy aluminum base. They also provide five years of after-service once you make a purchase. 

The SF-2000 is also energy efficient. It produces 1627 umol//m2ss (measurement unit for valuable light produced), whereas competitors only have 1057 or 1253 umol//m2ss. This will save you money when your electric bill comes at the end of the month. It consumes just 0.1 kWh

Cheaper Option: SF-1000

Size: 11.8″ X 10.5″ X 2.3″ 

Spider Farmer emphasizes keeping its lights affordable, so it’s no surprise there are cheaper alternatives to the SF-2000. The SF-1000 has all the accessories of the SF-2000 but in a smaller package. 

Spider Farmer lights also come with a dimming dial on the side and are adaptable to multilight dimming daisy chains to keep all the light in the room at the same level. 


  • High-quality yields
  • Red and blue light source
  • Five-year service
  • Energy efficient


  • No internal fans for cooling
  • Run very hot

#3 Mars Hydro: TSW 2000W

Size: 19.57″ x 17.28″ x 3.54″

If you’re looking for LED grow lights, Amazon is an excellent place to start. People with large grow rooms need to connect several lights, and these FS LEDs are the best grow lights for that purpose. You can connect up to 15 multi lights in a chain and control them all simultaneously. The lights are easy to hang as well and fit comfortably next to one another. 


The TSW 2000W has no fan cooling system. That means you’ll have a calm and peaceful grow room for you to work and enjoy. It also means they run very hot. You will want to regularly check the temperature in your grow room to make sure they don’t overheat the plants. 

Mars Hydro also advertises a high light output as well as a longer lifespan for their well-built LEDs. Reflective foil on the outside and edges ensures higher brightness for the plants and the entire grow room. 


  • Easy to group together
  • Great for large grow rooms
  • No noise


  • Very hot
  • No cooling system

#4 Vivosun: 1200W Cree COB

Size: unavailable. 

The Vivosun 1200W Cree COB is the most stylish LED grow light on this list. It has a box design that makes it look very high-tech and is also well ventilated to prevent overheating. It also has a mix of six high luxury Cree COB and 3W LED chips, making it more energy-efficient. 


The material for these LED grow lights is at a premium as well. They use aluminium and polycarbonate to get tough casings that will last. The cooling system is mighty with two large heat sinks for heat dissipation. 

Cheaper Option: VIVOSUN 600W

Customers will be happy that this model is half the price of the 1200W but much smaller. It is even more stylish because of its black shell and pretty purple and red light pattern on the bottom. 


  • Stylish
  • Energy Efficient
  • Made from strong materials
  • Heat dissipating


  • No dimensions listed on the website

#5 Optic LED Grow Lights: Slim 500S

Size: 42″ x 42″ x 4.5″

These are the only grow lights on our list that don’t follow a square-shaped design. The Slim 500S has six strips of lights that span across the frame. This design’s advantages are that the light is less overpowering, and they take up less space.


It also combines two light types, the Samsung LH351H deep Red and LH351H royal blues, to create a unique and innovative light spectrum. They are compatible with a touchscreen master controller to adjust all the lights in the room from one place. 

Cheaper Option: Slim 320S 

Size: 42″ x 21″ x 4.5″ 

The slim 320s have all the features of its more expensive brother but are smaller. It only has four LED strips instead of six. 


  • Different shape
  • Red and blue LEDs
  • Touch Screen Controller


  • No cooling system

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What Are the Differences Between Grow Lights and Full Spectrum Grow Lights? 

As we mentioned earlier, the only difference between a normal grow light and one with a full spectrum is the range of light. Typical grow lights will be on a narrow spectrum of red to blue, but the full range will reach every colour and the invisible light spectrums of ultraviolet and infrared. Additionally, full-spectrum LEDs are usually more expensive than their counterparts. 


Frequently Asked Questions (FAQS)

Here are some commonly asked questions about grow lights. 

Are grow lights a fire hazard? 

As long as you keep a close eye on their temperature and don’t run them 24/7, then you should have nothing to worry about. 

Most indoor grow operation fires result from faulty electrical wiring or water entering the electrical system. If you keep a close eye on both of these factors, you’ll keep your grow room safe from a fire. 

How long should I leave my grow light on? 

Most plants work well on 12 hours on/12 hours off cycle. This time will change based on your plant’s stage of life. Also, keep in mind it’s possible to leave them on for only eight or 10 hours to save on electrical costs. 

How to hang grow lights

Depending on what type of system you have set up in your grow room, there are different ways to hang the lights. A good rule of thumb is to hang less powerful lights 24″-36″ above your plants. If you’re working with more powerful LED grow lights in am or pm, they should be 48″-62″ above your plants.

What is the difference between LED Grow Lights & HPS Grow Lights?

HPS or High-Pressure Sodium Lights can emit a huge amount of light however it takes a lot of energy to run these lights and there is a lot of waste. LED grow lights on the other hand are much more energy efficient. 

Wrap Up

If you want to grow plants indoors, then full spectrum LEDs are your best option. They are the lights on the market that mimic the sun’s energy most effectively. Employing them in your grow room will lead to greater yields and healthier plants. 

We include products we think are useful for our readers. If you buy through links on this page, we may earn a small commission.


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