Growstar LED Review – Good For Cannabis?

Do you like to grow plants but you live in a place where winter days are long, or you don’t have a lot of backyard space? Using a grow light might be the solution you are looking for a long time.

An Overview

A grow light, for your information, is an artificial lighting that mimics the sunlight to help stimulate photosynthesis which is needed for plant growth. This lighting is often used solely or as a supplement in places where there is very little sunlight available.

In addition, grow lights also try to mimic different lighting conditions to aid the various stages of plant growth. One drawback of it, though, is it is not suitable for all types of plants.

Grow lights have actually been used for over a century by horticulturists. In the 1880’s, grow lights were made of carbon arcs and then, fluorescent lamps were used in the 1930’s.

In the 1950’s, high-pressure sodium lamps were utilized as grow lights and in 1990’s, LED lights were tested for plant growth at the University of Wisconsin.

Presently, LED grow lights are still being used because they are more energy efficient. Though they can initially be costly, they are more cost-efficient than others in the long run. That is because they are cooler, use lesser energy, and are more long-lasting than other types of grow lights.

An example of the aforementioned is the Growstar Ultrathin Super Light, which we will be reviewing for you to determine if it will work for your garden.


  • Maximum power of 45 watts
  • Dimension is at 13 x 13 x 0.4 inches
  • Weighs 2.5 pounds
  • Contains a total of 225 pieces of 0.2-watt epileds
  • Lifespan is 50,000 hours or eight years
  • It has a 60-degree reflector cup.
  • Recommended for indoor use only
  • Input voltage is at 110 volts
  • Frequency is 50-60 Hz
  • Grow panel is made of aluminum for better heat dissipation
  • Features an IR and UV spectrum to provide support for different plant growth stages
  • Recommended hanging height:
    • Seedling: 36 to 40 inches
    • After one week- 24 inches
    • Rest of the growth stages- 15 to 18 inches.
  • Comes with a five-feet power adapter
  • Equipped with a 1/8 -inch hanger, 12.6-inch steel wire rope, and separated hooks.


  • It comes with a money-back guarantee and one-year warranty.
  • It is easy to setup and use.
  • The LED lights are long lasting.
  • It has a safety feature.
  • Its lights are bright but have low wattage.
  • This grow light is thin and compact.
  • It is environment-friendly.
  • The company provides 24/7 customer service.


  • It is not waterproof and for indoor use only.
  • This grow light is not for all types of plants.
  • The lights may not be bright enough for some users.
  • The backside of the panel gets very hot which can be a fire hazard.

A Summary

The Growstar Ultrathin Super Light features a 60-degree reflector cup that allows you to collect light and this also creates highly efficient power for better plant growth. Its LED lights have different colors to help support different growth stages.

This indoor plant light is thin and light so it is very easy to setup, meaning, there are no special tools required. Also, although it is light, it is a durable product because its parts are made of aluminum and steel.

You will also get great value from this product because it can last for very long time with normal usage of 12 to 18 hours a day.

The manufacturer of this product provides 24/7 customer service, so in case you will have problems with it, you can get help right away. The 40-day guarantee offered is excellent so that if ever you are not satisfied with this item, you can return it and get your money back easily. Furthermore, you can get free repairs because of its 12-month warranty.

Finally, you must note that this plant light is designed for indoor use only because it is not waterproof. You should never attempt to use it outdoors so you can avoid the product from getting damaged.

A Comparison with KINGBO Reflector Grow Light Panel

Like the Growstar Ultrathin Super Light, this indoor plant light also features a 60-degree reflector and a 0.4-inch thin casing that’s made of aluminum. Similar to the Growthstar indoor light, its LED lights have different colors to help support various growth stages and the light power is 45 watts.

Likewise, it also has a 1/8-inch hook and steel wire ropes. Its size dimension is also similar to that of the Growthstar indoor plant light.

Additionally, this indoor plant light’s input voltage is also 110 and its frequency is 50-60 Hz and also has 225 pieces of epileds and lifespan is also 50,000 hours. Like the Growthstar indoor light, the manufacturer of this product also provides customer service and a money-back guarantee and a 12-month warranty. Both are also only recommended for indoor use since they are not waterproof.

As for their differences, the KINGBO indoor light is heavier because it weighs 2.6 pounds, while the Growthstar weighs only 2.5 pounds.  As per the money-back guarantee, this product has a 60-day offer, while Growthstar has 40 days only.

Since both of the products have very slight differences, they are great choices because they can similarly provide the indoor lighting that you will need to make plants grow. 

The Final Verdict

Although the product is not waterproof and made only for indoor use, we still recommend the Growstar Ultrathin Super Light because like any other LED grow lights, this one is also energy- and cost-efficient. It is a full-spectrum grow light so you can be sure that your indoor plants will thrive.

Moreover, it has IR and VR lights to aid the varied stages of plant growth. This grow light is made of durable materials to ensure that you will be able to use the product for a very long time.

If by any chance you are not satisfied with the product, you have an option to get your money back as long as you return it within 40 days. Aside from that, it also comes with a one-year warranty.

The manufacturer’s 24/7 customer service is also a huge plus for this product because you can get help anytime if you will have some issues with it. Finally, it is lightweight and easy to set up; therefore, you won’t need any special tool in installing it.

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James Alexander James Alexander
Hey, I'm James! The founder and head writer here at I started this site to share my passion and knowledge of all things cannabis. I used to work as a budtender in central Amsterdam, and have over 7 years of growing experience.

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