Blue Spectrum LED Grow Lights Review

Do you know which color of light is vital for plants to grow? Blue and red are the most essential.

Blue light has a wavelength that ranges between 400 and 500 nm. The light provides relatively high energy to drive the process of photosynthesis and to support growth. It encourages bushy growth rather than extensive growth. When your plants do not get exposure to blue light, they will grow but will become weak and spindly.

Blue LED Grow Lights

When growing your cannabis, you need to ensure that your plants get enough of the specific lights that are of utmost importance. Here are some of the best blue LED grow lights that you can use to supplement your plants.

See also:

Our Top Pick Blue LED Indoor Grow Lights

Yescom 225 Blue LEDs Grow Light Ultrathin Panel

It is rare to find an LED grow light that specializes in providing only one spectrum of light. The Yescom Blue LEDs Grow Light is a very thin light fixture that focuses explicitly on producing a blue LED light spectrum. The grow light comes with all that you can use to install it and use it.

You can use it as a supplementary light to another grow light giving a full spectrum light. It all depends on the stage of growth of your plants. The blue light from the lamp is entirely for the vegetative growth phase.

It has a wavelength of 450nm. Since the bulb provides light for only one growth stage of your plants, it is relatively cheaper than full spectrum lamps.

The lamp can deliver a light output of 2475 lumens after only using 22W of power. The grow light can save energy of up to 90 percent. Its LEDs are in a circuit design protecting the lamp from a short circuit when one LED is damaged.

Since the lamp is thin, it cannot house a fan. It, however, has a piece of PCB that helps with the dissipation of heat from the system. The lights are very cool to touch even after running for 24 hours. It has a lengthy lifespan that can last for 50,000 hours in operation.

The grow light comes with its hanging kit, making it very simple to install and start using. It works best in an indoor space that helps the lamp concentrate the light on the plants. If you want to use an LED lamp, but you want one with a specific light spectrum, then this lamp is for you.


  • It is slim, lightweight and easy to install and use
  • Works incredibly as a supplemental light
  • It provides a high quality light to your plants making them grow healthy
  • It does not produce a lot of heat
  • It can last for a very long time
  • It can provide extensive coverage ensuring that far plants absorb the light
  • It is highly efficient and energy saving


  • It does not work effectively in open space
  • The company making the light does not offer a warranty

HQRP New Square 12″ LED Grow Light System

The HQRP New Square 12″ LED Grow Light is a powerful LED that makes a tremendous complimentary light. The lamp has 225 LEDs giving a blue light with a wavelength of 465nm. It consumes a power of only 14 watts, making it very energy efficient.

The grow lamp comes in a thermoplastic body. Its LEDs have a circuitry body that helps to prevent damage on one LED from affecting the whole fixture. The light from the lamp improves the chlorophyll absorption rate by the plants.

It, therefore, promotes the vegetative growth of your plants. Even though the lamp does not produce any UV or IR rays, it has a UV meter that tells you of the amount of UV in your grow room. The meter color changes from light purple to dark purple when there is a high intensity of UV production.

You can, therefore, protect yourself from the harmful effects of UV light. The grow light comes with a hanging kit making it easy to install the light. It comes with a warranty of 200 days.


  • The lamp uses durable die-cast LEDs to produce the blue light
  • It is energy efficient as it consumes only 14W
  • It is simple to set up and install
  • It comes with a 200 days warranty


  • Not many people know of the brand

Miracle LED Almost Free Energy 100W Growth Starter Blue LED Grow Lite

The Miracle LED Growth Starter Blue LED Grow Lite may look similar to the standard incandescent light bulb, but it is quite different. The grow light is quite cheap and cost-efficient. It uses only 9 watts by can readily replace a 100-watt incandescent bulb. The bulb provides enough growing power to help your plants develop strong stems and become healthier. It produces a blue light wavelength of 475 nm. It is then an excellent supplementary lamp to use during the vegetative growth phase. The bulb does not emit any UV light and does not have any mercury. It is perfect for use in any environment. The lamp comes with a one year warranty that is limited to any accidental, liquid, or personal damage. You can increase their efficiency in your grow room by using more than one bulb in a similar way to how CFL bulbs are grown.


  • The bulb is very cheap
  • It is easy to install and use
  • It does not emit a lot of heat
  • It is very energy efficient as it uses only 9 watts of power


  • The bulb is quite dim and has a low power output

Diboys 45W LED Grow Lights

The Diboys 45W LED Grow Lights comes in a pack of two, each with 225 high intensive LEDs. The red LEDs are 165 pieces, while the blue LEDs are 60 pieces. It produces a red light of 620 to 630nm and blue light of 460 to 470nm that help your cannabis plants grow healthier and faster through all the stages.

The bulb does not harm the environment in any way. It has a design of reflecting cups that help to focus the light onto the plants. The lamp is highly efficient and energy-saving as it can provide a light that is three to five times stronger than from incandescent bulbs.

The lamp comes with thick aluminum board and ABS case that safeguard the LEDs from damage. It does not overheat due to its air flowing design. It dissipates heat from the LEDs efficiently, prolonging their lifespan. Even still, it does not produce a lot.

It can provide a covering of 3ft by 3ft when you place the lamp at the height of 2ft. If you want your plants to get the best results, ensure that the lamp stays 1 or 2 feet away from the plants. You can use the light for 10 to 12 hours every day.

The lamp comes with a 12-month warranty and a 30-day guarantee. You can claim 100 percent of your money back within the first 30 days if the light disappoints you.


  • It produces a powerful blue light that can trigger growth and boost photosynthesis
  • It is easy to set up and use
  • It can last for 50,000 hours when in use
  • It does not produce a lot of heat
  • It is very energy efficient
  • It comes with a warranty and a period to claim back your money


  • It is not waterproof
  • The brightness of the lamp can affect your eyes

ABI 12W Blue LED PAR38 Grow Light

The ABI Blue LED PAR38 Grow Light is rate above most in the market due to its ability to deliver your lighting requirements. The bulb is not expensive and does not require a lot of power. It provides a light spectrum with a wavelength of 450 to 460 nm.

The light is very bright and efficiently reaches your plants. It uses only high quality parts assembled in the USA. The lamp has a clear, diffused lens that helps to maximize the output. It also helps to increase the coverage. You do not have to worry about heat since the lamp is very cool.

Even though it is small, it comes with an internal integrated ball-bearing fan. The fan helps to extend the life of the fan by ensuring that it remains cool throughout its operation. It does not produce any noise. The grow light can fit in an E26 socket, which you can find in most households.

Apart from using it to grow cannabis in an indoor grow tent, you can use it in an aquarium to grow coral reef. The bulb can run for 50,000 hours or more.


  • It is lightweight, durable and easy to use
  • It can work in any standard socket
  • The bulb uses high quality components
  • It can last for a very long time
  • It produces a very efficient light
  • It does not emit a lot of heat
  • It comes with a three-year warranty


  • It does not give any information on PPDF or lumen

Summing up

If you want your cannabis plants to grow well without any problems, you need to ensure that they receive a good supply of blue light. When you notice your plants are growing taller but are weak, it is the blue light that is lacking. You can choose one of the above grow lights to add as a supplementary light.

5/5 - (3 votes)

Bowden draws from over a decade of home growing experience as well as consulting for small-scale and hobbyist-level growers. He has written hundreds of articles, thought pieces, and tutorials about growing cannabis at home

Leave a Comment