Best Grow Lights for Weed
Growing Cannabis indoors allows you the opportunity to have complete control over the growing and producing stages of the plant to ensure the best possible crop. Certain strains of Marijuana are sensitive to the types of lights used to promote growth, as well as the amount of light offered through the day. Because of this, if you are growing indoors you will want to make sure you have a dependable, long-lasting light for peace of mind.
Not all grow lights are made the same. Differences in spectrum offerings can affect plant growth stages in different ways, and it’s important that you are aware of how different types of bulbs and light influence your harvestable plants.
Table of Contents
- How much space do you have for your grow?
- How much time do you have to give to your grow?
- Do you plan on forcing your plant stage growths?
- Apollo Horticulture GL60LED Full Spectrum Grow Light
- Advanced Platinum Series LED Grow Lights
- California Lightworks Solarstorm 440-watt LED with UVB
- Roleadro LED Galexyhydro Series 300W with UV&IR Grow Light
- Hydro Crunch T5 High Output Fluorescent Grow Light
Grow lights are artificial light sources used to mimic the natural spectrum of the sun. This helps influence both plant growth and maximizes production through the chemical process of photosynthesis. This process allows plants to convert light energy into something they can use. These lights are easy to use and run off your home outlets for power. Plus, are popular with everything from hobby growers to cash crop producers due to the control you have over light quality and time. And they come in a variety of spectrum choices to fit the various needs of your plant growth stages.
Grow lights also come in a variety of sizes to meet the needs of the many spaces that may be used to grow your plants. Everything from small grow tents to larger greenhouse nurseries can benefit from the control grow lights. Since light is one of the major components plants need to thrive and survive, you will be able to manipulate and influence growth and overall production.
Most plants use variable amounts of the entire light spectrum in one way or another. The rule of thumb is that young seedlings and maturing plants need an abundance of short blue wavelengths. These provide warmer temperatures which support healthy vegetation. Blooming and producing plants require the longer red hued wavelengths, which are cooler and mimic the sunlight of later in the day as the growing season progresses.
Luckily, most of what a plant uses fall within the visible spectrum and can be easily measured. When you can’t decide which types of grow lights to purchase, you can stick to lights found within the 420nm – 740nm range so you can support all stages of plant growth. There have been many studies on how small amounts of IR and UV rays affect plants. Be sure to read up on them.
The most important factor to take note of when growing a cannabis crop is your light quality and source. Luckily, this is also the easiest factor to control, so understanding the nuances of your crop, and the strain you are growing is an important detail to take note of.
In its natural state, plants receive slightly more light during their vegetative growth stages and equal amounts of light and darkness during their flowering stage. If grown outdoors this is how your cannabis plants will develop as well, but when you are in control of the light source, you can apply longer periods of growth to help develop strong branching and leaf development.
Although there may be slight differences from one plant type to the next, it’s ideal to apply approximately 18 hours of light to 6 hours of darkness during vegetative phases, and 12 hours of light to 12 hours of darkness when blooming and producing. Since you are in complete control of your plants you can tweak your timing to help force flowering, which can be a bit of a challenge with a short-day plant such as marijuana. It’s stimulated to bloom when 12 or more hours of darkness is applied. Any extra light during this period can throw off the schedule, hence, why indoor grows must be well-controlled.
Growing in popularity, LED lights put out very little heat, and are built into panels so you can mix and match individual diodes that emit various light spectral wavelengths. This means you can offer support to all stages of growth at the same time.
How much space do you have for your grow?
How much time do you have to give to your grow?
Do you plan on forcing your plant stage growths?
- Light Type: LED
- Spectrum Range: 430nm, 475nm, 620nm, 630nm, 660nm, 730nm & White
- Plant Stages: growth and production
- Wattage: 75 – 1200
- Warranty: 2 years
With a huge range of choices starting at a 75 watt through 1200 watt panel choice, Apollo Horticulture provides compact, powerful LED grow light designs for all stages of plant growth. It’s very affordable, possibly even one of the cheapest offered, each panel includes hanging kits and power cords and is suitable for just about any indoor grow setup from small tents to hydroponic systems.
Each panel is well-equipped with cooling fans and 4 sided ventilation to help avoid heat retention and series of bulbs that are varied to include a wavelength range from 430nm to 730nm to support both growth and production. White bulbs are also included to help mimic a more natural light spectrum.
- Quiet fan
- Sturdy Construction
- Excellent veg stage growth
- Excellent customer service
- Not as strong for bloom stages
- LEDs may not last 50,000 hours
- Light Type: LED
- Spectrum Range: UV – IR
- Plant Stages: all
- Wattage: 150-1200
- Warranty: 5 years limited
Platinum LED has created a powerful series of LED panel lights called Advanced Platinum, which spans from a 150 watt to 1200 watt panel design to choose from. With a full 12-band light spectrum that includes UV and IR, these lights are supposed to provide 2 to 3 times the light efficiency.
With toggle switches between veg and bloom, you can specify the light spectrum needed for your plant’s stages to maximize efficiency. Plus, no ballast is needed to use these units. Simply plug them right in to get going and hang directly over where needed. A series of fans complete each housing unit, as well as well placed ventilation and aluminum coiling heat sinks to ensure a cool running system.
- Increased performance with both veg and bloom
- Great for flowering plant
- Noticeable plant growth
- May not cover as much space as advertised
- Fans slightly loud
- Must experiment with distance
- Light Type: LED w/ Fluorescent
- Spectrum Range: Full + UVB
- Plant Stages: Veg and bloom
- Wattage: 110 – 1100 watt
- Warranty: 3 years
California Lightworks has a few series of lighting systems that range in strength from 110 watts to 1100 watts, all created to harness the cooling, full spectrum properties of LED bulb function. Unique to the company is the inclusion of an added veg stage support Fluorescent UVB bulb system to provide an increase of cannabis THC and CBD production.
With the dual lighting design, you are able to control what light properties your plant receives with a simple flip of a switch. Either way, your plants will be exposed to high photosynthetic photon flux (PPF) for serious canopy penetration, which is extremely helpful in influencing an increase in bloom and the related higher production yield.
- Great customer support
- Stays cool and quiet
- UVB for increase of THC and CBD
- Plants don’t reach for the light
- Does not come with ratchet hangers
- Very concentrated light
- Light Type: LED
- Spectrum Range: Full + UV, IR, and White
- Plant Stages: Veg and bloom
- Wattage: 45 – 1600 watt
- Warranty: 3 year
Roleadro’s 45 watt to 1600 watt light choices encourage just about any grow situation. Their Galexyhydro series allow for a red to blue spectrum ratio of 8 to 1 that is more specific to bloom and high production crop yields, but still provides sufficient lighting for mature growth. With the addition of small amounts of both UV and IR, your plants are influenced to product protection against viruses as well as increased vigor.
Fans and proper ventilation, combined with built-in heat sinks, helps keep these type of lights running in any indoor space. This also allows for a cool running system to ensure you can keep your lights going up to 20 hours at a time to force and manipulate specific stages of plant growth.
- Supports transplant growth well
- Power efficient
- Supports all stages of growth well
- Needs more blue light for better veg support
- Takes time to find proper height placement for max use
- Light Type: Fluorescent
- Spectrum Range: ~340nm – 680nm
- Plant Stages: Vegetation
- Wattage: ~54-1000
- Warranty: 1 year
Fluorescent bulbs have been popular for many lighting situations simply due to how cool and long they run. Plus, their overall energy draw is low, especially when on for long periods of time. Since they are more specific to the warmer, blue wavelength, fluorescent lights are also a top choice for seedling and mature growth stages of plants, making them a perfect grow light for getting a good crop well started towards bloom and production. With variable mounting options available, you can place these lights in a variety of different situations, including along a wall.
The Hydro Crunch includes 95% reflective aluminum interiors on their units to help provide an additional cooling effect. It also draws the light to where you need it. Most units are also compatible with varying tube temperature ranges, offering choices between 6700 and 6400k so you can provide a more concentrated light to your plants during very specific growth stages.
- High functioning and durable
- Great vegetative growth support
- Bright and well focused
- May have some shipping issues, covered by warranty
- Specific to growth stage support not bloom
Obviously, your choice of lights are going to be specific to your plant needs, grow space, and even personal preferences based on your past experiences. Growing cannabis for either personal use, or as a cash crop requires a bit of research to determine what is best for your strains, and to maximize potency. One of our top picks based on consumer experiences is the California Lightworks Solarstorm 440-watt LED with UVB. The company offers other products that provide a wide spectrum of lights. Plus, the additional fluorescent support provided by the design help ensure healthier grow. This light also provides optimal control for growers who prefer a wider spectrum of light for a wider range of plant needs.
If you have any questions about our picks, or have used any of them yourself, we’d love to hear about your experiences below. And, as always, please share!