[UPDATED] The V300 VIPARSPECTRA 300W LED grow light has been the number one best seller among indoor grow lights, so we reviewed it to find out why it is so popular. We’re always on the lookout for good LED grow lighting to recommend.

Since this review was originally published it’s become the top seller among our readers too—just one reason why we selected it among our Top 10 Recommendations for 2018 on the home page. Accordingly, we decided to update and republish the original review.

Read on to find out what makes this full spectrum LED grow light such a popular choice…

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VIPARSPECTRA 300W LED Grow Light: 420 Beginner Review

First off, this is a basic LED grow panel that’s good for beginning growers who are starting out small. Its light covers 2 feet by 2 feet for optimal growth, and it really does penetrate down into the canopy. The panel contains a mix of 5-watt LEDs that put out a full spectrum of light, from infrared to ultraviolet. Let’s take a closer look at all of this.

PAR spectrum for Viparspectra V300 led grow light

Spectrum for the Viparspectra V300 full spectrum LED grow light.

The far ends of the spectrum are invisible to the human eye, so that’s why some of the LEDs don’t look like they are lit. That doesn’t mean it’s safe to look at the panel when it’s turned on. Use protection like the Method Seven Grow Room Glasses. That way you don’t damage your eyes, and you can inspect your plants without turning off your panel or needing a different light.

Why are LEDs a good idea for growing plants indoors?

For one, they use less electricity to put out a lot of light. They create less heat so you don’t need extra fans to cool down your grow tent. Both of these factors mean you save money on your power bill and (hopefully) don’t draw the unwanted attention of authorities.

Growers in the past used HPS/MH HID lights. Those abbreviations mean “high pressure sodium/metal halide high intensity discharge.” That kind of lamp needed an additional component called ballast to keep their light output from flickering too much. They put out a lot of heat, suck up a lot of electricity and the bulbs need replacing regularly.

What HID light does the Viparspectra V300 replace?

VIPARSPECTRA created the V300 to replace a 250 Watt HPS/HID light. Their LED panel doesn’t run hot or burn your plants. The heat it does generate is controlled by large fans and heat sinks built into it already, and it doesn’t need a ballast.

While it’s rated for 300-watts output, it only consumes 136 watts of energy. That’s less than running three 60-watt incandescent bulbs (not like you can find those for sale anymore).

LED chips from quality manufacturers

The 5-watt LED bulbs that VIPARSPECTRA uses come from well-known companies like Bridgelux and Epiled, manufacturers that both have good reputations. VIPARSPECTRA has the LEDs mounted at a 90-degree angle pointing straight down at your plants.

Light intensity: PAR, lumens, etc.

When they mention lumens and PAR, they’re talking about the intensity of the light emitted by the V300 panel. Lumens are for humans, so don’t try to measure the quality of your light by how bright it would be to your eyes. What matters is PAR, which is a measurement of the intensity and coverage of the light.

(Check out our beginners’ guide to marijuana grow lights if you want a refresher on PAR, lumens and how plants respond to different light wavelengths.)

The PAR of the V300 was mapped out with the panel hung two feet above the canopy of the plants. The best coverage for vegetation and flowering is limited to just 2 by 2 feet although the light does reach out to 3 by 3 feet. Since flowering needs a lot of light, don’t try to crowd in too many plants.

Viparspectra v300 300w led grow light - PAR values

PAR values at 24″ for VIPARSPECTRA V300 full spectrum LED grow light.

VIPARSPECTRA offers a 3-year warranty and a 30-day satisfaction guarantee so you can try it out to see how your plants grow. On the upside, if you love the V300, you’ll be glad to know that LEDs can last between 50,000 and 100,000 hours before they burn out. Since 100,000 hours is about 11 years, you’ll probably upgrade this light before you need a new one.

How many plants can I grow with the Viparspectra 300W LED grow light?

A mature cannabis plant generally takes up about 1 square foot. So with this light’s maximum coverage of 4 square feet, you’re looking at growing up to 4 marijuana plants. However, with a coverage of 2.25 square feet for flowering, we’d recommend it for a 2-plant grow, unless you’re going to add supplemental lighting for flowering—extra red LED panels or bulbs, for instance.

Some other useful details about the VIPARSPECTRA 300-watt LED grow light:

  • Can be daisy chained for larger grow spaces
  • Weighs 5.6 pounds, measures 12.6 inches long by 7.9 inches wide by 3 inches thick
  • Comes with hanging kit and 6-foot power cord
  • Accepts 50-60Hz, 100-240V AC
  • 60 LEDs total
  • VIPARSPECTRA is a trademark of the Shenzen Bailuo Technology Company, Ltd.

Our verdict:

An excellent, highly affordable full spectrum LED grow light for home growers and hobbyists.

Buy the VIPARSPECTRA V300 (click to check latest prices) if you want to grow 2–4 plants. Or daisy chain multiple units together to light larger grow spaces without breaking the bank.

Also comes in a dimmable model, the VIPARSPECTRA DS300. For only marginally more money, you’ll get a little extra control of the spectrum and the option of dimming the light instead of adjusting the hanging height.

Also consider the VIPARSPECTRA PAR600 for larger grows.

Further reading:

Looking for something different? Check out our home page for our top recommendations. You’ll find a wide range of LED grow lights selected to suit a variety of budgets and grow space sizes.

Is this your first grow? Check out our Beginners’ Guide for more practical tips and information on growing with LED lights.