It might not seem to be the right move if you are investing your money on high duty grow lights, especially when it is a smaller garden and less number of plants you have. 

Also, it is not surprising to see that LEDs are considered the best light for growing cannabis. Well, LEDs consume less energy and give out huge and brighter lighting facilities. No wonder they are having huge popularity over time.

In addition, they make your room fully lit and even provide the required lighting facility to the plants. Another important advantage of LED lights is that they reduce the heat generated from the bright lights. So, the area near the plants remains cool.

Best 300 Watt LED Lights For Growing Cannabis

1) VIPARSPECTRA UL Certified 300W LED Grow Light, with Daisy Chain, Full Spectrum Plant Growing Lights for Indoor Plants Veg and Flower

This LED light uses the optimal full spectrum layout, making it ideal for all kinds of indoor plants and vegetables. Also, it has one of the best PAR output as the reflector design will easily increase the PAR output by 50%.

The VIPARSPECTRA UL 300W LED’s design helps in bringing more lights to the plants, and at the same time, it does not concentrate a lot in the middle spot which might lead to stunted plant growth. In addition, it has a sturdy design, making it fire-resistant iron housing.


● It is UL Certified and meets the whole UL testing and safety standards for ensuring safe and good operation.

● The optimal full spectrum lighting provides the plants of all stages with everything that is required in natural sunlight.

● It is sturdy as well as durable, making it fire-resistant.


● This kind of LED light is more suitable for beginners. Large scale growers might need a bigger and better one.

● It does not have an automatic timer

● Unluckily, this 300 watt led light is not waterproof.

2) Roleadro Grow Light, 1000W LED Grow Light Full Spectrum Galaxyhydro Series Plant Light for Indoor Plants with UV&IR for Greenhouse, Hydroponics, Seedlings, Veg and Flower

Another major 300 Watt LED lights for growing cannabis is the Roleadro grow light. Roleadro was founded in the year 2008 and are specialized in the development, research, sales, and manufacture of LED aquarium lights, LED grow lights, and LED underwater lights.

After a decade of being the best LED lights supplier, it has risen to be a key player in the industry. Now the 300 Watt LED grow light bulb review is that it provides a 2-year chip replacement for support. 

This LED bulb series has high-intensity Epiled LED chips. They increase the PAR that helps in the growth, support, yield and development of the plant.

Besides, another important feature of this 300 Watt LED grow light is that it helps the plants to grow in any season and any environment, even in the winter. Using this LED light you can grow any kind of fresh and healthy vegetables and that too at any time.


● It has high power 3W branded epileds which makes it environmentally friendly, energy-saving and provides high brightness.

● It has the best and professional light proportion along with the best ratio of blue and red rays. This provides a better light environment for your cannabis plant’s growth

● High-quality IC, UL approved fans that are well designed, and anti-noise ensures that it provides powerful cooling performance and even extended lifespan.


● Lack of dual-mode switches

● Exclusion of the daisy-chaining

● Not waterproof

3) VIPARSPECTRA UL Certified Dimmable DS300 300W LED Grow Light,12-Band Full Spectrum for Indoor Plants Veg and Flower, Has Daisy Chain Function

For meeting the various spectrum demands of flowering and vegetative stage of plant growth, the VIPARSPECTRA DS 300W LED grow light has the dimmable feature design. This allows and provides the exact spectral control, making sure that the brightness of the light can be started with the lowest power and then it can increase gradually.

Also, the reflector design of this 300 Watt LED lights for growing cannabis will easily increase the PAR output by 50%, making it scientifically engineered to create a balance among the best PAR output and the coverage. The LED light is designed in such a way that it brings in more light to the plants and at the same time avoids concentrating right in the middle part. 

The presence of the daisy chain feature helps growers to utilize this light as a whole, with fewer outlets. You won’t need additional cords for this and just by simply pulling the plug in the provided power cord; you can get the connection for various units.


● Evenly distribution of the light

● Best cooling system

● Penetration of dense canopies

● 100,000 hours lifespan


● It is more prone to rust. 

● It is extensively bright and if not managed it will burn the foliage.

● It is not waterproof.

4) 300W LED Grow Light Full Spectrum for Hydroponic Indoor Plants Growing Veg and Flower perfect for 24″x24″x48″ and 48″x24″x60″ grow tent kit and package

This is one of the best 300 watt led lights for growing cannabis which is filled with full-spectrum and provides off indoor plants with the favorite purple tint. Unlike other LED lights, this emits a wavelength of light that can be easily absorbed by the plant right from the seedling to harvests, making it good for vegetables and flowers.


● It has the best professional light proportion that is filled with the best ratio of red and blue rays. This provides a good light environment for the growth of the plant and improves the growth speed. 

● Also, this LED bulb has UL approved fans combined with the well-designed fan blades and high-quality IC. This makes it anti-noise and provides the best cooling performance. 


● Like most of the LEDs, this is not waterproof.

● There is a lack of or no automatic timer facility.

5) VIVOSUN 300W LED Grow Light Full Spectrum for Hydroponic Indoor Plants Growing Veg and Flowering

If you are checking this 300 watt led grow light bulb review, you might come across that this provides full spectrum grow light. So, it leads to explosive vegetative growth and brings more muscle to the flowering cycle. It provides a perfect balance spectrum for the plant.


● This 300 Watt LED light has built-in-large 5” cooling fan which provides a cool, and quiet environment for the plants to grow.

● The full spectrum feature provides the best and optimal light spectrum coverage and maximum PAR output at many distances. 

● The presence of composite metal robust casing dissipates produces more heat. Thereby the extended lifespan of the LED device is 100,000 working hours. 


● It is prone to get rusty quickly.

● It is not waterproof.


Frankly, the above reviews of the five best 300 Watt LED light might help to simplify your choices. If you have any doubts or feel that we have missed some awesome 300 Watt LED lights, do provide your suggestions in the comments below.