Top Best 300w LED Grow Light Reviews

Choosing the appropriate grow light for indoor plant management and operation is very crucial. There are numerous available products in the market to choose from, such as fluorescent lights, high-intensity discharge (HID) lights and light-emitting diodes (LED) lights. Among the three, the LED grow lights are the most efficient choice since these are cost-effective lights, as well as the safest.


The type of grow light to use is not the only factor to look into. There is various wattage available depending on the size of the indoor garden. A power too low will not provide sufficient light essential for the grown and development of plants, which will stagnate the plants thus producing fewer harvests. On the other hand, a power too high will produce too much light, which will burn the leaves of the plants as well as consume too much electricity thus not a cost-efficient way of managing and operating an indoor garden.


Luckily, LED grow lights offer a wide range of wattage for the grower to choose from, depending on the requirement of the plants being grown. This wide range of lights will easily fit in the grow space, be it a large-scale farm or a small-scale garden.


A 300-Watt LED grow light provides essential lights for small-scale farming, up to 3 feet width and 3 feet length space on the average, with its full-spectral light range sometimes including ultraviolet and infrared wavelengths, which are important in the development of defense mechanism of plants. These 300-Watt LED grow lights are equipped with fans for its cooling mechanism as well as reflectors to optimize the light. Some even have a dual-switch system to maximize the critical light only during different stages of growth, where the blue spectrum is needed for the vegetative stage and red spectrum for the flowering stage. There are other features available for different brands, hence, before purchasing, the product should be thoroughly scrutinized to get the best value for the money.

Best 300 Watt LED Grow Light Reviews


PRODUCTAverage Power Draw (Watt)Coverage Area (Feet)Price
Mars Hydro 300-Watt LED Grow Light1202’x2′$69.00
Viparspectra V300 Series 300-Watt LED Light Grow1302’x2′$69.99
Advanced Platinum P30093 Watts for Veg/ 180 Watts for Bloom4.5’x3.8′$369.00
Ledgle 300-Watt LED Grow LightNot mentioned3’x2′$66.99
MarsHydro Reflector 48 300-Watt LED Grow Light1052.5’x2.5′$107.99
Meizhi 300-Watt LED Grow Light1193’x2′$63.99


Mars Hydro 300w

With a price of 69 USD, the Mars Hydro 300-Watt LED Grow Light can have a maximum coverage area of 3.5 feet by 3.5 feet, with a core coverage area of 2 feet by 2 feet. With its 11”x10”x3” dimension, this grow light can easily be installed and adjusted inside a grow box or grow tent since this is suitable for indoor growing, be it through soil method or hydroponic technique of growing plants. Moreover, this is light-weight, which weighs only 5.29 pounds.

This full-spectrum plus infrared wavelength LED grow light has a reflective frame design to ensure uniform light intensity dispersal. It is the right grow light for growing plants from the vegetative phase to the flowering phase, thus producing high yields. Also, it takes pride for its energy-saving mechanism with only 120 Watts power consumption. Furthermore, this light can be used for more than 50,000 hours. Its safety design features a separate integrated circuit board and heat sink, thus damage in one component does not cause serious problem to the whole set. The cooling system consists of quiet high-speed fans to dissipate heat.

The Mars Hydro 300-Watt LED Grow Light offers a daisy-chaining capability.

This LED grow light is ETL- and CE-certified, which gives the buyer an assurance that this is a good quality product and it is safe to use. Also, this product comes with a 3-year warranty as well as a 30-day money-back guarantee.


  • Full-spectrum LED grow light
  • Highly energy-efficient
  • Optimal and uniform light dispersal
  • With high-speed cooling fans
  • With daisy-chaining capability


  • Not waterproof

Viparspectra V300

The Viparspectra V300 LED Grow Light is a 300-Watt grow light suitable for managing and operating a small indoor garden. With a price of 69.99 USD, this product can cover an area of 2 feet by 2 feet. Its dimension is 8 inches wide, 12.8 inches in length and 2.8 inches in height, weighing only 6.4 pounds. It consists of 60 pieces high-intensity 5-Watt Epiled/Bridgelux LEDs giving off a 12-band full spectral range of light, which are essential in the growth and development of plants from the vegetative stage to flowering stage. It is also with an infrared wavelength, which promotes blooming. This LED grow light, with a lifespan of more than 100,000 hours, ensures an energy-saving usage with only 130 Watts power draw.

Aside from its efficiency, the Viparspectra V300 LED Grow Light also provides a safe usage of the product. It has undergone rigorous tests to meet safety standards and receive a UL certification. Its durable build is composed of fire-resistant iron housing, as well as fire-resistant reflectors. These reflectors provide a maximized intensity of well-balanced light dispersion inside the grow box or grow tent. To dissipate heat, the cooling mechanism is designed with 4.72-inch quiet cooling fans and finely finished aluminum heat sinks. Moreover, it offers a daisy-chaining capability, thus offering easy installation and easy control for multiple uses of this LED grow light.

Purchase of this product offers a 3-year warranty and 30-day return policy.


  • Durable built
  • 12-Band full-spectrum with infrared light
  • Fire-resistant housing and reflector
  • Efficient power consumption
  • With daisy-chaining feature


  • Not waterproof

Advanced Platinum P300

The Advanced Platinum P300, which is valued at 369 USD, features a 12-band full spectrum LED light with full ranges of ultraviolet light, from its depth, and infrared wavelength, to its peak, therefore mimicking the natural sunlight. This optimizes the light given to plants for healthy growth and development, thus producing a greater harvest. Also, along with this LED grow light is an integrated 90° secondary focusing lenses, which allows light to penetrate deep within the canopy. It has a dual-switch system to either use the Veg mode for the vegetative stage, which consumes 93 Watts power, or Bloom mode for the flowering stage, with a power consumption of 180 Watts. This maximizes the emitted light according to the pant requirement in every phase of growth and development. The LEDs in the unit has a lifespan of more than 100,000 hours.

This LED grow light is manufactured with high-quality materials, thus durable. It has 100 pieces of 3-Watt LEDs. The cooling mechanism consists of high speed and quiet cooling fans to dissipate heat, and upgraded aluminum cooling heat sinks. With a dimension of 8.25 inches width, 19 inches length and 3 inches height, this product weighs 13 pounds. Its coverage area is 4.5 feet by 3.8 feet, which exceeds its competitors. However, during the flowering stage, the most effective coverage area is 3 feet by 2 feet.

The product comes with a 5-year warranty and 90-day satisfaction or returns guarantee.


  • 12-band full spectrum light with full ranges of ultraviolet and infrared wavelengths
  • LED light integrated with secondary focusing lenses
  • Durable design
  • Wide coverage
  • With cooling system


  • Not waterproof
  • Relatively pricey

Ledgle 300w

The Ledgle 300-Watt LED Grow Light displays an11-band full spectrum of light crucial for plant growth and development. Integrated into the LED light system are red, blue, yellow and white lights with ultraviolet and infrared wavelengths. It is composed of 50 pieces 6-Watt LEDs which are scientifically engineered to give off well-balanced light resembling the natural sunshine. There are different switches for different light spectrum to ensure to meet the different light demands of the plants in different stages of growth and development. Also, a 120°-angled crystal lenses are installed for the plants to receive maximum light needed.

With a price of 66.99 USD, this grow light can cover an area of 3 feet by 2 feet for the vegetative stage and 2 feet by 1.5 feet for the flowering stage. Amazingly, the angled crystal lenses provide better coverage.

The Ledgle 300-Watt LED Grow Light, which has a dimension of 6.3 inches in width, 11.8 inches in length and 2.4 inches in height, is designed with an adjustable socket for the grower to easily adjust the height of the grow light and with controls to easily regulate the light intensity. This product, which weighs only 6 pounds, features strong hanging support. Moreover, the cooling system design effectively dissipates heat. It has holes in the aluminum panels for heat convection, as well as 2 quiet cooling fans and heat sinks.


  • With UV and IR wavelengths
  • Wide coverage
  • With angled crystal lenses for maximum light emission and maximum coverage
  • With cooling systems
  • Different switch controls for different spectra


  • Not a 12-band spectrum LED light
  • Not waterproof

MarsHydro Reflector

The MarsHydro Reflector 48 300-Watt LED Grow Light is full-spectrum light that consists of 60 pieces 5-Watt LEDs with reflector around each diode, thus maximizing the light being given off to the plants, which ensures that enough light is received by the plants for healthy growth and development, so as the plants will produce maximum yield. This product has different switches for the vegetative phase and the flowering phase to provide the appropriate light to the plants in different stages since different phases require unique light spectrum.

With a size of 12 inches width, 12 inches length and 12 inches height, this LED grow light only weighs 5.5 pounds. It can cover an area of 2.5 feet by 2.5 feet, but for the flowering phase, its effective coverage is reduced to 2 feet by 2 feet. It is designed with a separate integrated circuit board and heat sinks to ensure the safe use of the product. Also, it is equipped with quiet and efficient cooling fans to dissipate heat, which is located in the LED main panel.

Valued at 107.99 USD, the MarsHydro Reflector 48 300-Watt LED Grow Light, only consumes 105 Watts of power, making the product cost-efficient. Moreover, it has a lifespan of more than 50,000 hours.

This CE and ETLcertified product comes with a 3-year warranty and 30-day money-back guarantee.


  • Full-spectrum LED light
  • With reflectors to maximize emitted light
  • Dual-switch, Veg mode, and Bloom mode
  • Light-weight
  • With a cooling mechanism to dissipate heat


  • Not waterproof

Meizhi 300-Watt LED Grow Light

The Meizhi 300-Watt LED Grow Light is an affordable grow light for a small grow tent or grow box. It exemplifies a very good range of light spectrum for the growth and development of plants to have maximum yield. With a price of 63.99 USD, this full- spectrum grow light consists of 60 pieces 5-Watt Epistar/Bridgelux LEDs, thus distributing sufficient light to the plants. It has 120° reflector panels that focus all emitted light into the plant. It has different switches for Veg and Bloom modes, to ensure that only the essential spectra in the LED light are given off during the different stages, from germination to harvest. Its design includes the new SMD type LED technology, which is a technology that avoids chip melting when the temperature is high. The cooling mechanism includes aluminum cooling sinks and 2 cooling fans, where only one cooling fan works during the Veg mode, and both during the Bloom mode.

The size of the product is 7.9 inches width, 12.6 inches length and 2.8 inches in height, and it weighs 7.25 pounds. It can cover an area of 3 feet by 2 feet. Its power consumption is only 119 Watts, thus the use of this product in indoor garden operation is certainly cost-efficient. Moreover, it has a lifespan of more than 50,000 hours. It also offers the daisy-chaining capability.

To ensure safe usage of the Meizhi 300-Watt LED Grow Light, rigorous testing was done, therefore earning the product its ETL certification. The power cord is also certified with UL.

This affordable yet high- end performance grow light comes with 1-year local warranty and 30-day money-back guarantee.


  • Full-spectrum LED grow light
  • Affordable yet exemplifies high performance
  • With SMD-type LED technology
  • Dual switch design
  • With daisy-chaining capability


  • Not waterproof
  • Only one fan working during Veg mode

Conclusion: Best 300 Watt LED Grow light

Before purchasing a 300-Watt LED grow light, its suitability to the indoor garden operation and management has to be taken into consideration first, as well as its power consumption and price.

The coverage area should be checked. Not looking into this might result in multiple installations of 300-Watt LED grow light, which is not so much of a problem if the daisy-chaining feature is available. The Advanced Platinum P300 offers the widest coverage, an amazing 4.5 feet by 3.8 feet. However, it is priced at 369 USD, which is not ideal for a limited budget for LED grow light. A more affordable option is Meizhi 300-Watt LED Grow Light or Ledgle 300-Watt LED Grow Light, valued at 63.99 USD and 66.99 USD, respectively, which still offers a wide coverage area of 3 feet by 2 feet.

The product with the least power consumption is the MarsHydro Reflector 48 300-Watt LED Grow Light, which only draws 105 Watts for 2.5 feet by 2.5 feet coverage area. Dual-switch system is ideal to maximize the light emitted for certain plant stage only, thus consuming less power in the long run. An example is the Advanced Platinum P300, which only consumes 93 Watts for Veg mode during the vegetative phase, but draws 180 Watt power for the Bloom mode during the flowering phase. These kinds of features should also be scrutinized.

Furthermore, the LED grow light should give off a full spectral range since this will result in a healthy plant, thus maximizing the yield. Most brands mentioned offer full-spectrum. Also, the reflectivity of lights is a factor to consider. This maximizes the light emitted and it disperses uniform intensity of light which is crucial for growth and development of plants.

Lastly, the design of the product to purchase should be safe to use. Buying a cheap and unreliable LED grow light exposes the grower and the indoor garden to risks. Hence, it is important to look into brands which are certified to be safe and secure to use.