The Top 8 Purple LED Grow Lights In 2021

If you go on Amazon, you’ll see hundreds of “purple” LED grow lights.

Those lights are purple because they emit a mix of blue and red light that fuels photosynthesis and improves growth.

Although the popularity of white LED grow lights is on the rise, many growers still use purple LED grow lights.

In this article, we will look at the best purple LED lights that you can use to grow different plants indoors.

Purple LED grow lights  

Here’s a list of 8 great and highly recommended purple LED grow lights:

  1. Viparspectra Reflector Series LED Grow Lights

Unquestionably, Viparspectra Reflector Series LEDs are the most popular purple grow lights in the gardening community.

Those devices have an overall purple spectrum that is slightly richer in blue light than red light.

You can modify the spectrum of Viparspectra Reflector LEDs through their Veg and Bloom switches. This feature is helpful if you want to save energy during the vegetative or seedling phase. 

There are several different models in the Viparspectra Reflector Series. The best model for you is the one that can cover your growing area.

Those lights are really inexpensive.

Don’t forget to use the coupon code HERBSWITHIN to get an 8% discount on your light.

  1. Kind LED K3 XL300

This purple LED grow light has one of the most optimized light spectrums for plants.

It emits more red light than blue light, so it’s excellent for flowering plants. It also puts out small quantities of far-red and infrared light that can boost flower formation and yield.

The spectrum of the light also includes small quantities of Ultraviolet UVA light that enhance nutrients and volatile levels. 

Kind LED K3 XL300 also has secondary optical lenses that improve canopy penetration by more than 200%.

The light has a good light output and its coverage area is around 2’ x 2.5’ (0.6m x 0.75m).

Kind LED K3 XL300 is high-priced, so it’s mostly recommended for professional growers who want to achieve the best results.

  1. BESTVA DC Series

Bestva DC series LEDs are a brilliant choice If you’re searching for a purple grow light with an optimized spectrum that is more affordable than Kind LED K3 Xl300.

The purple spectrum of those LEDs is equally rich in red and blue light, but it also contains good quantities of green light.

Bestva DC grow lights also emit far-red and infrared light as well as UV light.

The lowest model in the series draws 185 watts of power only and can cover up to 4’ x 4’ (1.2m x 1.2m) growing area!

Bestva DC grow lights are far less expensive than Kind LED K3 lights.

  1. Likesuns Gooseneck LED Grow Light

In case you want a purple grow light to illuminate your low-light houseplants, this gooseneck LED light would work well for you.

The spectrum of this device is very balanced but it’s mostly rich in red and blue light. That’s why the overall light appears purple.

You can adjust the spectrum of the device between blue, red, and purple and the intensity between 10% and 100%.

Likesuns also has a built-in timer that allows you to choose whether you want to keep your light on for 3, 9, or 12 hours a day.

The light is very inexpensive.

Note: This light is not very intense, so it won’t suit your medium-light to high-light plants. It’s only suitable for plants with low light demands or maybe as a supplemental light.

  1. Sondiko LED Grow Light Strip

Similar to Likesuns, this LED grow light strip is great for low-light houseplants.

The great thing about those purple LED strips is that they can be used to grow plants on shelves.

Their spectrum is very similar to that of Likesuns, and its intensity can be also adjusted between 25% and 100%.

The light also has three time settings: 2, 4, and 8 hours. 

Each Sondiko LED grow light pack contains two strips that are around 13 inches long.

Just like all LEDs, those light strips have a very long lifespan (around 50,000). They’re also very cheap (check their prices here on Amazon).

  1. Roleadro 75W

Roleadro 75W is another good purple light for plants with low to medium light needs.

Although it’s labeled 75W, the actual wattage of this LED is around 25 watts, which means it’s not that intense.

The spectrum of Roleadro 75W is around 2 times richer in red light than blue light.

The light can be easily hanged above your plants, and for the best results, you need to keep a maximum distance of 36 inches between it and the plants.

The price of this Roleadro 75W is close to that of Sondiko LED strips.

  1. Toggled LED Grow Tubes

Toggled purple LED tubes to fit in T8 or T12 fluorescent lighting fixtures, so if you have one, you can use those lights to grow your favorite plants.

Although they emit a purple light, those tubes have a very balanced spectrum with peak wavelengths of 490nm (blue) and 650nm (red).

Each light has a PPF output of around 30 μmol/s, so four toggled LED tubes can cover a good coverage area. 

Toggled LED grow tubes are at least 50% more efficient than fluorescent lamps, so by using them, you’ll save more money on your energy bill.

  1. Miracle LED grow light bulb

Miracle LED grow bulb is not the most intense light, but it’s more versatile, so it can be used in different growing setups.

Its purple spectrum is very rich in blue, so it’s for low-light leafy plants.

The lamp only draws 12W of power, so if you’ll need more than one bulb to cover a wide growing space.

You can use this Miracle LED grow light bulb with a decorative lighting fixture in your living area.

Are Purple LED Grow Lights Outdated?

Many growers are ditching their purple grow lights and replacing them with new full-spectrum white LEDs. But why?

Indoor gardeners are becoming more aware of the fact that plants don’t only need red and blue light, so they’re choosing lamps with spectrums that are also rich in green, yellow, and orange light.

That’s reasonable but getting rid of all purple grow lights for that reason is wrong.

Purple LED Grow Lights Are Effective for Growing

Some of the purple grow lights we mentioned above have highly optimized light spectrums for plants even though they don’t emit white light.

So, it depends on each purple grow light and its characteristics.

But, in general, high-quality purple grow lights will give you amazing results and this is 100% guaranteed.

Maybe, modern LED grow lights use more efficient diodes and have better heat dissipation systems but that has nothing to do with the spectrum of those lights.

So, long story short, purple grow lights are still great for plants. 

If you want to take a look at full-spectrum white LED grow lights, you can check HLG quantum boards, which are among the best grow lights on the market today.

But, in case you want to use purple LED grow lights, make sure to choose one of the lights we recommended above.

Enjoy growing, and please share your thoughts in the comments below!

Blogger, Gardener | + posts

I'm Jad, a biologist, blogger, and experienced indoor gardener. I am knowledgeable in plant biology, particularly in plant cultivation and propagation. I founded HerbsWithin.com in 2019 to share my knowledge in indoor gardening with passionate home growers.

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