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Best LED Grow Light for Vegetables 2021

Find out our top picks for the best LED grow light for vegetables in 2021? We also answer questions related to LED grow light and provide buying guides to help you find out the most suitable fixture for you.


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Last update on 2021-05-11 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

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Introduction

Growing vegetables or plants indoors can either be a relaxing hobby or a way to become self-supplied. But we all know lighting plays an important part in boosting photosynthesis, and not every household has enough lighting to nurture plants or vegetables. Thus, it’s necessary to purchase indoor lighting that helps the vegetables to thrive. 

LED lighting is one way to go as it offers energy efficiency, long-lasting and full-spectrum light, not to mention it’s even eco-friendly. So it’s obviously a winner among all lighting technologies. 

Here in our post, we give you a list of the Best LED Grow Light for Vegetables, along with buying guides and FAQs that surely provide helpful information. 


Terms

One problem when buying a LED grow light for vegetables is the terminologies described on the lighting products (for example, 2.7 µmol/ J, 760nm, etc). If you’re a beginner, the information might be too overwhelming. But rest assured, below we try to explain three basic terms in the most simple way. Hence, you can easily read the product details and clear all the myths around which LED grow light for vegetables or plants is the best.

PAR (Photosynthetically active radiation) 

PAR is not a measurement of the amount of light that the plants or vegetables should be received, but it rather determines the quality of solar radiation that the plants absorb best in the process of photosynthesis. 

PAR is measured in nanometers, ranging from 400 to 700. Within this PAR waveband, plants use specific wavelengths for different biological purposes.   

  • 400nm to 490nm (dark blue to light blue): used by plants when they accumulate resources for flowering and reproduction, which is also called a vegetative stage.  

  • 580nm to 700nm (orange to red): imitate the sunlight in the late summer and early fall, indicating it’s time for plants to fruit. 

PPF (Photosynthesis Photon Flux) 

PPF measures the amount of PAR that a lighting system produces per second. The units of PPF are µmol/s. It doesn't show the amount of light that lands on the vegetables, but rather the amount of light generated by the lighting system. 

It’s said the center of the lighting has the most focus photon while the density gradually fades out in further spots. (But this should be taken at an average level as it’s only true to some extent)

Based on this, we can see that the positioning of your plants/vegetables is also important since if placed in the position that is dense in PAR, your plants/vegetables are likely to benefit the most. 

Photon Efficacy 

Photon Efficacy indicates how efficient a lighting system can convert electric power into photons of PAR.

The calculation of photon efficacy (Kp) equals the photon flux divided by input electric energy. The unit is micromoles per joule (μmol × J-1), or micromoles per second per electric watt (μmol × s-1 × We-1)

These three basic terms are often confused to hobbyists, therefore, we hope that our explanation can help you to understand more about all the myths going around LED grow lights and its production details. 


Reviews

Knowing that each buyer has different needs, we’ve researched the lighting market to create a list of best LED grow lights for vegetables (or plants). Our list is diverse in budget, growing scale, up-to-date products, customer reviews and feedback. 

1. SPIDER FARMER SF-2000 LED Grow Light - Best LED Grow Light for Vegetables, best overall

“Worth every penny”, “highly recommended” and “energy efficient” are some of the top reviews for this LED Grow Light. And surprisingly enough, there are nearly no complaints about this five-star product. Spider Farm designs varied products for different coverage needed, so you can also search for the fixture that is most suitable for your garden or farm. 

Pros:

  • Lower running cost

  • Customized dimming design

  • Ideal for all growth stage

  • Well-made and solid construction

  • Value for the money

Cons:

  • Apparently, no cons reviewed

2. King Plus 4000W Double Chips LED Grow Light Full Spectrum - Best LED Grow Light for Vegetables, combined lighting

One special trait of this fixture is the combination of full-spectrum LED and Ceramic Metal Halide (CMH). This gives it an aesthetic point, and the users can switch between both lighting to benefit their plants or vegetables. Plus, it also offers a suitable mix of wavelengths that can be used for flowering stage or vegetative stage. 

Pros:

  • Full-spectrum 

  • Advanced cooling system

  • Penetrate deep past the canopy

  • Make no noise during work

  • Reasonable price 

Cons:

  • Sometimes encounter quick-burn-out LED lights.

3. King Plus New Model 1000w LED Grow Light Double Chips - Best LED Grow Light for Vegetables, best budget

One incentive this fixture offers is the detailed information on PPFD Value, so for those who love the science behind grow light, you are likely to feel satisfied knowing exactly what this light is doing. It’s recommended for small indoor plants and small closet planting. 

Pros:

  • Has Veg/Bloom switch

  • Full-spectrum LED

  • Energy-saving technology

  • Advanced cooling system

  • Professional service

Cons:

  • Can get damaged items through shipping, but quickly get a refund or another replaced product.

4. Home Green Flower Vegetable Grower Durable Plant LED Light - Best LED Grow Light for Vegetables, best for small-scale planting

If you’re at the first step in the journey of farming, or you just want to grow some homemade veggies or herbs, this fixture is more suitable for small-scale indoor gardening. It has a neat and polish design that can make you fall in love at the first sight. 

Pros:

  • Great customer service

  • Decent stability

  • Suitable for growing herbs and vegetables all year round

  • Can grow up to 4 plants at a time

  • Has own water circulation system

Cons:

  • The stabilizer needs to be dry.

5. AeroGarden White Harvest Indoor Hydroponic Garden - Best LED Grow Light for Vegetables, best for beginners

This is another great design to start indoor planting. The fixture includes simple sensor illuminated buttons to remind the users when to add water or when to add plant food. It also consists of soil-free, non GMO pre-seeded pods. Some recommend this product for kids if you want to start gardening with your children.

Pros:

  • Gourmet herb seed kit included

  • User friendly

  • Full-spectrum LED lights

  • Designed for in-home garden

  • Grow up to 6 plants at a time

Cons:

  • Hard to add water when the plants grow big


Buying Guide

In today’s market, there is a huge number of LED grow light products that can make buyers overwhelmed and confused not knowing which one to choose. Below we list out 5 factors that you should consider to narrow down your option.  

Lighting footprint

Lighting footprint is the area that the light fixture is able to illuminate. Thus, to choose a suitable LED grow light fixture, you need to know which fixture can provide the coverage that you want. One simple way is to use the recommended footprint given by the manufacturer, for example, 4x4ft or 2x4ft. This also helps you to choose the best light for your growing space.

Color Temperature

Color temperature describes the light appearance, which is measured in Kelvin degrees on a scale from 1000 to 10,000. If you’re looking for a color temperature that is best for seedlings, 6500K is recommended. You can look for this information provided in the online shopping websites or printed on the products.

Environment control

What lights do you use to control the environment, for example, temperature or humidity? The climate in the planting space depends directly on the following factors: area of ​​the planting space, the ability of the vacuum cleaner, bulbs that use cooling measures (water or air). The above factors determine the reasonable distance between the light bulb and the plant and which models to choose from.

Saving energy

The price of electricity is not cheap, so growers need to calculate carefully before starting their crop. This requires thorough research before purchasing lights. A small tip for growers is to use reflective materials glued around the lawn to convert light direction in order to take full advantage of the intensity of light emitted by light bulbs.

Light life cycle

After one year of use, light bulbs will usually reduce their ability by 25%. Therefore, growers need to replace or use new light to compensate for this decrease. LED light that is turned on continuously will age faster. Thus, light life cycle also plays an important role in picking the right lights.


FAQs

Will any LED light work as a grow light?

Basically yes, but it doesn’t ensure your plants or vegetables would grow in a healthy and efficient way, as regular LED lights do not include enough light spectrum for photosynthesis process. 

What grow lights are best for tomatoes?

Grow lights with color temperatures of 2500-3000K are best to encourage flowering and are often utilized when the plant fruits. This light radiates an orange to reddish color which mimics the sun light the most. 

What color light is best for seedlings?

Red light is not only responsible for making plants produce fruit. It's also necessary for a plant's seed germination and root growth.

Can you leave grow lights on 24 hours a day for vegetables?

It’s advised not to leave grow lights 24/24 for vegetables as it would force the vegetables to grow more quickly. The right amount of time to let the light on is around 12 to 18 hours. 

What is the best wattage for LED grow lights?

It is recommended that 32 watts of actual wattage per square foot of growing space would be suitable for large plants. 


Final Thoughts

If you still can’t make up your mind on which LED Grow Light for vegetables to purchase, we recommend you should start it out with our top three products:  best overall SPIDER FARMER SF-2000 LED Grow Light, best combined lighting King Plus 4000W Double Chips LED Grow Light Full Spectrum and best budget King Plus New Model 1000w LED Grow Light Double Chips.

Hopefully, the guide equipped you with helpful info on how to get the best LED Grow Light for Vegetables. To own a high quality LED Grow Light for vegetables, you should check out the products we suggest above.

Pawel Dimitri
Pawel Dimitri
Hey, I’m Pawel Dimitri, creator of LedLuxor.com. I’ve been blogging and writing guides/reviews on lighting items for over five years now.