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The 5 Best LED Grow Lights (2021 Review)

Help your indoor plants grow with a high-quality LED grow light. In this review, the This Old House Reviews Team researched the five best LED grow lights on Amazon to help you find the product that’s right for you and your home. The products included in this article are available at various home improvement stores, local home centers, and online retailers like Amazon.

Best LED Grow Lights This Old House Production

Grow lights mimic natural sunlight, allowing you to grow your plants indoors. If you’re looking to start an indoor garden, read our review below to learn about the best LED grow lights available on Amazon.

Best For Medium Coverage: Spider Farmer SF-2000 LED Grow Light

This LED grow light has a three-by-four-foot coverage area for vegetative plants, which works well for homeowners who have a handful of plants. It also includes dimming and color-changing functions for customizable lighting.

Key Features

  • Six-by-six-foot vegetative coverage
  • Five-by-five-foot flowering coverage
  • 100,000-hour lifespan
  • Customizable lighting with color-changing and dimming functions

What Customers Are Saying

This LED grow light has over 2,700 reviews and a 4.8-star average rating. Ninety-six percent of customers gave the product a minimum of 4 stars. Only 3% of the reviews have a 1- or 2-star rating.

Customers liked this grow light’s full-spectrum quantum board, low power consumption, and simple but polished design. However, a couple of customers also said that it wasn’t worth the expensive price.

Best Accessories: MARS HYDRO LED Grow Light

This grow light comes with a thermometer and a timer, allowing you to determine how long the lights have been on and how warm your growing space is getting. Its exterior light control also lets you dim its full-spectrum lighting as needed.

Key Features

  • Three-by-three-foot vegetative coverage
  • 2.5-by-2.5-foot flowering coverage
  • 50,000-hour lifespan
  • Customizable lighting with color-changing and dimming functions
  • Thermometer, hygrometer, and timer included

What Customers Are Saying

Over 5,600 consumers have left a review on Amazon for the MARS HYDRO LED Grow Light, giving it an average rating of 4.7 stars out of 5 stars. Ninety-three percent of the reviews have 4 or more stars, and 4% have 2 or fewer stars.

Customers liked this product because of its efficiency and daisy-chain functionality. On the other hand, a common complaint among dissatisfied customers was that the instructions manual was difficult to follow, making assembly and usage complicated.

Best For Large Coverage: Spider Farmer SF-4000 LED Grow Light

This grow light has a maximum coverage area of six by six feet, allowing you to provide light to a large number of plants. It also has a dimming function, a plug-and-play design, a color-changing option, and a thin, modern aluminum frame.

Key Features

  • Six-by-six-foot vegetative coverage
  • Five-by-five-foot flowering coverage
  • 100,000-hour lifespan
  • Customizable lighting with color-changing and dimming functions

What Customers Are Saying

The Spider Farmer SF-4000 LED Grow Light has been reviewed over 2,200 times. It has an average rating of 4.7 stars out of 5 stars, with 94% of the reviews having 4 or 5 stars and 4% having 1 or 2 stars.

Those who were satisfied with their purchase said that this light provided great heat dispersion. They said that although it was expensive, the results it produced were worth the price. Negative reviews mentioned issues with flickering lights and burned plants. Several customers also said that they were unable to reach the seller to replace or repair their faulty product.

Best Tubular Lights: Barrina Plant Grow Lights

This pack of grow lights comes with several tubular lights instead of one square light, allowing you to customize its coverage layout. The grow lights are made of aluminum and polycarbonate for a lightweight but sturdy design.

Key Features

  • Six four-foot tubular lights
  • 50,000-hour lifespan
  • Two-year warranty

What Customers Are Saying

With over 1,100 reviews, the Barrina Plant Grow Lights have an average rating of 4.7 stars out of 5 stars on Amazon. Ninety-three percent of reviewers gave the product a 4- or 5-star rating, while 3% of customers left a 1- or 2-star review.

Several customers agreed that the Barrina Plant Grow Lights worked well for those who were just learning about indoor gardening because of their energy efficiency, price, and high-quality results. Unsatisfied customers said that the Barrina Plant Grow Lights had a weak light output. Several also mentioned not receiving their order in full.

Best For Small Coverage: VIPARSPECTRA LED Grow Light

This LED grow light provides coverage to a two-by-two-foot area, making it best for homeowners with only a few indoor plants. The light is also suitable for every growing phase from seedlings to ripe vegetables.

Key Features

  • Two-by-two-foot vegetative coverage
  • 1.5-by-1.5-foot flowering coverage
  • 100,000-hour lifespan
  • Customizable lighting with color-changing and dimming functions
  • Three-year warranty

What Customers Are Saying

Around 3,000 reviews have been written about the VIPARSPECTRA LED Grow Light on Amazon. The item has an overall score of 4.6 stars out of 5 stars, with 90% of reviewers giving the product 4 or more stars and 5% of the reviewers giving it 2 or fewer stars.

The majority of reviewers said that they liked the product because it saved energy, didn’t make a lot of noise, included a warranty, and had an affordable price. Unhappy customers said that the diodes burned out after a short period of time.

Buyer’s Guide

Before buying an LED grow light, read our buyer’s guide below to learn about important factors that’ll help you make an informed purchasing decision.


Grow lights typically give you measurements for how much vegetative and flowering coverage they offer. Be sure to choose a light that matches the amount and type of coverage you need.


A grow light’s wattage determines how much light it produces. Different plants require different amounts of light, so don’t just choose the light with the highest wattage. Instead, match the wattage to the plants you’re growing. For example, if you’re growing tomatoes, choose a grow light that offers about 32 watts of light per square foot.


Several features of your LED grow light should be adjustable.

  • Color: Plants need a different color light for every step of their growing cycle. The best LED grow lights offer red, blue, and white color options.
  • Brightness: In addition to color adjustability, LED grow lights usually have knobs for adjusting the brightness of their bulbs.
  • Proximity: You can also adjust how close the lights are to your plants by lengthening or shortening the rope or chain they’re hanging from.


Grow lights are usually mounted to the ceiling with a chain or rope. This installation process can take anywhere from 30 minutes to a couple of hours.

Frequently Asked Questions

What is the semiconductor chip on my LED grow light?

The semiconductor chip is the piece that converts electricity into light. The chip itself will have a wattage rating, with at least three watts being enough for adequate light production.

Are there other types of grow lights that don’t hang from the ceiling?

Yes. Some freestanding grow lamps sit on or clip to tables. They’re easier to install than hanging grow lights, but they can’t light as many plants.

Will my LED grow light increase my electricity bill?

LED grow lights are energy-efficient, so they won’t increase your monthly electricity bill by much.

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