How to choose the best indoor marijuana grow lights

When it comes to indoor cannabis growers, no matter you are an individual grower who grows for your own personal use, or you are a commercial growing company. The grow lights play a significant role of what you can get from your natural ladies.

But for commercial cannabis growers, the requirements for LED grow lights could be different due to difference in growing purposes, growing environment, and of course your budget.

So how to judge if one grow light is best for your commercial cultivation operations?

1.Must be Powerful enough

In terms of “being powerful’ for LED grow lights, it is not only about wattage, though wattage does indicates partly how powerful an LED grow light can be. But except wattage, we should pay more attention to several parameters as PPF, average PPFD, Efficacy.

PPF decides how much effective photons you can get from one grow light.

PPFD decides how effectively your plants can use the photons, generally speaking, the more averagely distributed, the better.

Efficacy, higher efficacy means you can get more photons with the same cost on electricity bill.

For commercial growers, average PPFD is better to be above 1000 μmol/m2/s, and all the way even up to 1500 or 2000, since most commercial cannabis facilities have CO2 enrichment system, plants can use much higher level of light for photosynthesis. In a small individual grow tent, higher PPFD above 1000 would be waste of energy, since most individual growers don’t have such complete system of CO2 enrichment, let alone precise control over humidity, temperature, nutrients, etc.

2.Must be built with top-quality parts with long working lifetime

Unlike individual growers, commercial growing facilities basically have to run every day for providing the year-around yield for the cannabis market. In this situation, you must have a very robust design of your LED grow lights.

And we need to understand that LED grow lights consists of several main parts which affect the durability most.

LED chips, top quality chips include brands as Samsung, Osram, Lumileds, Cree,, etc.These top LED chips can last a long life time of more than 50000 hours with 10% light loss.

LED driver, tops drivers include Meanwell, Inventronics, etc. Those best drivers usually offer warranty period up to 7 even 10 years.

Heatsink, this depends on the light manufacturer’s choice, but the larger the collective surface size is, the better the heat conduction is. The operation temperature should be no more than 60 Celsius degree in order to gain a L80 life time more than at least 5 years.


There has been no best spectrum for cannabis growing yet, though every manufacturer claims that it has the best. But we can recognize right way those spectra unsuitable for cannabis cultivation, such as too much red light, too much blue light, lack of infrared. Because cannabis requires a more balanced broad-band full spectrum for get the desired growth result.

But then how to choose the best balanced spectrum for your specific strains or specific growth stage requirement.

Try it with a small trial cultivation. There is no better way than to grow your plants with the actual light.


Though you may be scammed to get a crappy grow light with high price. But also remember, you cannot get a decent quality LED grow lights with apparently low price.

Because too low price is not even enough to cover the basic raw material and labor cost.

As a LED grow lights factory for 10 years, we can confirm that LED grow light price below 0.5USD per watt is impossible to use high quality material.

So some manufacturers tell you that their 1000 Watt LED grow light cost only 500USD. They either fake the wattage or fake the quality.


Warranty period should be at least 5 years. If the manufacturer is really confident about their quality, and their products are built with top quality material and workmanship, 5 years is safe for them to claim.

Check our Spectrum Lighting System

Grow Light System HM240 >>

Grow Light System HM480 >>

Grow Light System HM660 >>

Grow Light System HM960 >>

Jon Harris

Jon Harris

Commercial cultivator with 7 years experience running 200+ light indoor facilities in Los Angeles. I’ve grown in Greenhouse and Outdoor facilities in Ukiah, CA and Grants Pass, OR for 5 years and was trained by my Aunt and Uncle in San Diego. I love pheno hunting genetics and trying out the new crosses. My growing style is centered around mycorrhizae/bacteria helping push the plant and my favorite nutrients are HEAVY 16 and prefer Rockwool. I Specialize in buildouts/room design that are simple and cleanable, creating work friendly layouts and always keeping the maintenance of the equipment in mind. I have two German Shepards and I love benchmade knives. Completed my Bachelors of Science from Cal Poly Pomona in 2010.
Leave a Reply Here

About Us

Grow Pros Solutions is the NOW for Horticultural Science & Engineering. Grow Pros Solutions is one of the leading manufacturers of high-performance LED grow lights designed for cannabis cultivation. Our focus is to create top performing lighting solutions and fixtures that enable previously unobtainable and unthinkable results, increasing productivity from 30-60%. Our unwavering commitment to advancing technology and finding more efficient and sustainable solutions has made us a gamechanger for thousands of commercial and home growers. 

Recent Posts

Follow Us

Weekly Tutorial

Sign up for our Newsletter

Click edit button to change this text. Lorem ipsum dolor sit amet, consectetur adipiscing elit