Grow Lights

Viparspectra V900 Review

Looking for an affordable indoor grow light? As this Viparspectra V900 review shows, this grow light is suitable for beginners and professional growers. Viparspectra is a well-known brand that offers quality and durable proudcts, and there R900 model is energy efficient to boot. You can also expect an affordable price tag to reduce your operation costs. Read on to learn more about the Viparspectra 900W Reflector Series and whether it’s the next best purchase option for your growing needs. 

About The Viparspectra Brand

Viparspectra is a professional manufacturer specializing in LED grow lights and a trusted brand in the lighting industry. With 10 years of development expertise, they are recognized as producing quality and durable LED grow lights. For starters, their products are UL safety certified. This means it meets strict safety standards, including the risk of electrical shock, casualty, and fire. They also prioritize providing professional customer service, including great warranties. 

Viparspectra designs their LED grow lights around the following three financial drivers aimed to help you achieve your growing objectives:

  • Increase revenue per square foot
  • Deliver high-quality, consistent, year-round crop production
  • Reduce operating costs per pound of finished product

Viparspectra 900W Product Information

Sleek-looking, the Viparspectra 900W is designed for indoor growing activities and offers full-spectrum light, including visible light, ultraviolet (UV), and infrared (IR) light. It’s also energy efficient by using only 418W to provide the intensity equal to 1000WHPS. This helps reduce your operating cost per pound of the final product. 

viparspectra v900 review

A great feature of the Reflector Series is the built-in reflectors that help direct all the light towards your plant without scattering the light around in the tent or room. This reflector design also increases the PAR output by 50 percent. It uses blue light when the VEG switch is on and red light when the BLOOM switch is on. There are separate switches for each mode. Most customer reviews indicate it works best for vegetative stages but is still adequate for flowering. 

You also don’t have to worry about it overheating since there is an aluminum heat sink and two high-speed fans. Typically, it runs 70 percent cooler than HID lights. If your grow tent is properly ventilated, the light will increase the temperature to around 5 degrees Fahrenheit. However, this can be up to 10 or 15 degrees depending on your ventilation. 


  • Affordable 
  • Energy efficient 
  • Good heat dissipation and no need for an extra cooling system 
  • Offers a full 12 band light spectrum 
  • Includes an automated timer
  • Includes a dual switch between VEG and BLOOM modes 
  • Noise-free system 
  • Added safety with UL certification 
  • Responsive customer service 


  • It’s not waterproof 
  • Intended for indoor use only 
  • LED material quality is average

Coverage and PAR Value

For 4×4 feet of coverage, the recommended hanging height is 32 inches for vegetative stages. For the flowering stages, it is recommended you hang the light at 24 inches for 3×3 feet coverage. Generally, lower hanging heights produce higher PAR values. This LED grow light also isn’t designed to concentrate light into the middle of the plant canopy, so you don’t have to worry about burning or stunted growth. 

You can control your PAR value by moving the light closer or further, using the dual-mode switches, or the automatic timer. The PAR output values vary at the following hanging heights:

  • 6 inches: 2125 umols
  • 12 inches: 1416 umols
  • 18 inches: 915 umols
  • 24 inches: 608 umols
  • 36 inches: 298 umols

Warranty Information

The Viparspectra 900W grow light provides a 3-year warranty that is longer than most competitors in the market. Some customer reviews indicate the unit stopped working after 2 years. However, this is still within the warrantied timeframe. 

They also provide a 30-days money-back guarantee for all their LED grow lights. If you have any questions or seek professional guidance on helping your plants grow better, Viparspectra encourages you to reach out and contact them.

It is recommended to purchase protection glasses when entering the grow room or tent since this grow light produces high light intensity and PAR output. Using them will allow you to get into contact with direct light safely. Since some reviews say it’s a better product for vegetative stages than flowering stages, customers have found having a bloom booster for their plants helps make up the difference. 

Specifications Overview

Actual Power Draw390W ± 3%
Power Consumption 418W
LED Power900W
Number of LEDs180
LEDsHigh-Intensity 5W Epiled/Bridgelux
Light Beam Angle90 degrees
LED Lifespan100,000 hours
PAR Efficacy2125 umols at 6-inches to 298 umols at 36- inches
SpectrumFull-spectrum (including UV and Infrared)
Number of PlantsRecommended 4 with one unit
Vegetative Coverage Area4 x 4 feet
Flower Coverage Area3 x 3 feet
Ideal Vegetative Hanging Height32 inches
Ideal Flower Hanging Height24 inches
Product Dimensions16.5 x 16.5 x 3 inches
Product Weight15.7 pounds
Body Case MaterialIron
Input VoltageAC100-240V
Amperage Draw3.55A at 110V, 1.77A at 220V
Frequency Range50 to 60 Hz
CertificationsUL Certified

Installing and Using Your Viparspectra 900W Grow Light

The Viparspectra 900W package comes with a hanging kit for easy installment, including a 6-foot long power chord, adjustable rope hanger, and instruction manual. It works great in a 4×4 grow tent and can easily cover 4 medium plants at a time. However, some customers have also found it optimal in a 5×5 tent. Do note, that this grow light is intended for indoor use only. 

You’ll want to adjust the height of your grow light and usage hours to meet the needs of your plant’s stage. Viparspectra offers the following suggestions for using your 900W LED grow light depending on your plant stage. 

Acclimation Period

  • 44 to 48 inches above canopy 
  • VEG mode on and BLOOM off
  • 10 hours on and 14 hours off 

Young Vegetative

  • 40 to 44 inches above canopy 
  • VEG mode on and BLOOM off
  • 12 hours on and 12 hours off

Vegetative Stage

  • 32 to 40 inches above canopy 
  • VEG and BLOOM mode on
  • 18 hours on and 6 hours off

Flowering Stage 

  • 24 to 28 inches above canopy 
  • VEG and BLOOM mode on
  • 12 hours on and 12 hours off

Viparspectra V900 Review: Conclusion 

For an affordable grow light, the Viparspectra 900W reflector series provides plenty of value for your money. It offers great intensity, brightness, energy efficiency, and heat output. While some customers say they find it best for vegetative stages, others find no problem for both stages and appreciate the 3-year warranty on the product. 

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