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recommended lights for growing cannabis

Recommended lights for growing cannabis

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Can I leave my grow light on 24 hours?

5. Apollo Horticulture MH Light

The Sun System light emitting ceramic (LEC) is included in our top 10 lights for growing weed indoors because of its solid reputation. It’s been around for a quite a while, and there still aren’t many (if any) negatives to say about it.

The system is user-friendly and designed to be used straight out of the box. Simply plug it into an available wall socket, and it is good to go. The GRW also comes with a lens to help concentrate the light downwards to maximize the light source and better benefit your plants.

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4. Sunblaster CFL Grow Light

The Sunblaster CFL light doesn’t require any change to the existing light fixtures since the bulbs are compatible with the common bulb holders installed in homes and other buildings. They, unfortunately, don’t last long. Their rated lifespan is 10,000 hours.

Vivavolt T5 lights also cost less than LEDs, but LEDs last significantly longer.

Recommended lights for growing cannabis

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Unpacking Existing Information

In countries like Canada, where the federal government has legalized recreational cannabis, there is the ability to do more research. The University of Guelph is one organization that is leading the way in this research. As he states in this article from HortiDaily — Michael Dixon, Director of Environmental Control Research at Guelph says: “We have found that the optimal LED spectral recipe changes with every strain of cannabis.” This is a very important statement for growers to consider! Will you be growing just one strain in your grow the entire time? If not, what spectrum do you choose? Yet if the added blue light in flower only increases your THC levels by 4% is there a justifiable ROI in the cost of the added light spectrum?? If so, can you do that by just adding a few MH lamps? Or does the ROI make sense to go all LED? (1000w DE MH lamps are now available with the PL Light NXT 1000w DE fixtures).

No manufacturer , supplier, or customer can state they know the optimum LED recipe for cannabis (or tomato’s, or cucumbers, or orchids, etc.) as nobody has tested and tried multiple, different spectrums with each one being tuned to a specific strain or cultivar of each plant type to be able to render a quantifiable opinion.

These claims are not totally bogus however. We are now seeing real results that a bit more blue light in flower or at the very end of the flowering stage does increase terpenes/THC levels. Depending on where you search you will find these amounts vary from minimal 3-5% to unreal amounts of 26-38% as in this article from HortiDaily supplied by an LED manufacturer.

Young and mature plants, or vegetative and flowering plants, respectively, like different types of light, and you can buy grow lights that target each spectrum. Commonly, growers using HIDs will use MH bulbs for vegetative plants and HPS bulbs for flowering. Some LEDs are also designed to target different light spectra.

When growing outdoors you can harness the power of the sun, but in an indoor environment, sunlight is mimicked through the use of grow light bulbs, which aim to display the same spectrum of light as the sun.

Plant stage

Ventilation is also a concern. If you’re growing in a tight space with a light that runs hot, you’ll need to have fans in there, which also take up space. If there’s not enough room for a light and a fan, you may need to invest in a light that doesn’t run as hot, such as an LED. For example, grow tents are usually built tall to allow room for equipment up top, not to grow plants all the way to the ceiling.

There are many different kinds of lights out there, so it can be daunting to know where to begin. Here’s a guide to four basic types of grow lights on the market and the pros and cons of each.

Factors to consider before buying a grow light

LEDs also typically run a lot cooler than HIDs, so you may not need extra equipment to cool down your grow space, and one LED can usually be used for both vegetative and flowering growth. Some high-end LEDs allow you to change the spectrum for each growth stage.