These fluorescent lights are cheap and efficient and great for vegetative growth. They’re especially great for helping along germinating seeds and small seedlings because they don’t put off much heat and won’t scorch the delicate seeds. They won’t run up your electricity bill too much.
The typical homegrower will only need one or two lights. Most states limit grow amounts to 6 or 12 plants, and one or two lights should be plenty for that. If you plan on running two separate rooms, one for vegetative plants and one for flowering plants, you’ll need two lights.
Grow lights allow you to control exactly how much light your plants receive, ensuring they get the same amount of light day after day, without the grower having to solve problems with bad weather or cloudy days that happen in an outdoor environment.
The downside to CFLs is they aren’t great for flowering plants, and growers will usually use another type of light to finish plants. CFLs just don’t generate enough intense light for plants to pack on weight.
Some grow lights are more expensive than others, but also more efficient, saving money in the long run. Some lights are bulky with many parts, some light in weight, and some are better suited for young or mature plants.
Best HID grow light brands.
As with HIDs, you can find CFLs at any local grow shop.
LEDs (light emitting diodes) are relatively new to the cannabis growing world, compared to HPSs, MHs, and CFLs, but they are quickly proving to be the way of the future. LEDs may be more expensive to buy initially, but they are far more efficient and kinder to the environment and your electricity bill. Some cities even give tax breaks to commercial growers who install or switch to LEDs because they’re better for the environment.
Fixtures come in all shapes and sizes and can usually accommodate 4-12 long fluorescent bulbs; a standard size is 8 bulbs. Fixtures usually have a reflective material to bounce light in one direction, down on your plants.
For HIDs, light occurs as an arc between two nodes inside the bulb. The gas contained in these bulbs is what makes MHs and HPSs different. HID bulbs are usually more expensive than the reflective hoods that hold them.
Consider how often you’ll be growing weed and how long it will take to pay off the initial investment—if you grow once a year, it’ll take a lot longer to pay off an expensive light than if you grow multiple harvests a year.
You can find lights for under $100, but they may be low quality and not produce the right spectrum of light, and you can also easily spend as much as $2,000 for a large, state-of-the-art LED.
Here are a few different HID grow lights at different price points.
Lights have fixtures and bulbs, and some require a ballast. Depending on the type and model, the bulbs or the fixtures can be more expensive. There are a lot of abbreviations, but don’t be alarmed.
CFLs (compact fluorescent lamps) are fluorescent lights similar to what you’d find in a school or office building, but smaller. For growing weed, they are usually called “T5s”—the “T” stands for “tubular” and the “5” refers to its diameter, “⅝”.
There are many types of lights, but below are the four most common you’ll find in a grow room. There are many variations within each of these four types as well, and new lights and technology come out all the time.
Other considerations when choosing a cannabis grow light.
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.
Power equals poundage, so if you want big yields you’ll need more wattage. Professional LEDs can start at as little as 200 watts, and go up from there. A high-watt light can double the work of several low-watt bulbs.
Make sure you have enough outlets and power available in your breaker board for your grow space to comfortably accommodate all equipment. Figure out all pieces of equipment, such as lights, fans, possibly an AC or dehumidifier, and calculate how much power they’ll require. You’ll be running this equipment every day for months, so if you don’t have enough power it can be dangerous. Never overload an electrical outlet.
The first thing to consider before buying a grow light is how much money you want to spend. With more states coming online with adult-use legalization, homegrowing is becoming more popular and growing technology is getting better and more efficient all the time.
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.
HID (high-intensity discharge) is an umbrella term under which MH and HPS bulbs fall, which we’ll discuss more below. These types of lamps have a hood that reflects light and bulbs that are enclosed capsules containing a gas, as opposed to bulbs you’d find in your house, which have a filament that heats up.
There are daylight bulbs and warm white bulbs; the former better for vegetative growth, and the latter for flowering.
How much does a grow light cost?
Here are a few different CFL grow lights at different price points.
These HID bulbs usually contain sodium, mercury, and xenon, and produce a yellow/orange light, and are commonly used for flowering plants. Some growers will start plants under MH bulbs and switch them to HPSs when plants go into the flowering stage, using the same hood. These lights also require a ballast.
Aside from the price of the actual light, also take into account utilities—all lights will add to your electricity bill every month, but some more than others. High-intensity discharge lights—known as “HIDs”—may be cheaper to buy but can gobble up electricity, whereas LEDs are more efficient and kinder on your electricity bill but usually more expensive to buy.
These bulbs contain mercury and metal halides, produce a blueish light, and are commonly used for vegetative growth. They require a ballast to regulate the current. In the past, ballasts have been big and bulky, but digital ones are now available.
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.
You can find HID reflector hoods, as well as MH and HPS bulbs at any local grow shop.
One of the crucial elements a cannabis plant needs is light. During photosynthesis, a plant converts light energy into chemical energy, allowing it to grow strong and healthy, and with cannabis in particular, light also fuels bud production.
How big a light you need will depend on the number of plants you plan on growing, but also on the size of your space. If you’re growing in a closet or a small grow tent, you’ll only be able to fit one small light in there. If you have a wide open basement, you could invest in a bigger light as opposed to two smaller ones.
Can I leave my grow light on 24 hours?
As a general rule, however, CFLs produce the least amount of light, so these lights are best used for germinating or producing clones.
This light has stood the test of time for more than eight years, so you can be certain that your money will be well spent.
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.
For all types of cannabis, it is usually a good idea to purchase lighting that has both blue and red light spectrums. With regular plants, it saves you from the hassles and costs associated with changing the lighting to induce flowering. LED lights have a full spectrum of light, so you can use the same lights from seedling to harvest.
10. California Lightworks Solarstorm LED Grow Light.
What is the difference between a grow light and a regular light?
The only drawback of the G8LED is that it is on the pricier end of the lighting options, but what you get makes this high cost pale in comparison.
The Apollo metal halide grow light is rated 400Watts and has 4,200 kelvins. This makes this the perfect light for the vegetative growth stage of photoperiod plants (but not relevant for growers of autoflowers). This light is best suited for those growing a larger number of plants. This is because it is a bit demanding to install and use since it doesn’t come with the standard E26 base. It uses an E39 stand instead, so, you’ll need to install a separate ballast.
The Sunblaster compact fluorescent grow light is one of the best in its class. It can be affordable, too. In fact, the four-pack provides a great value for those sticking to a budget.
Seed Coupon Included.
Regular incandescent bulbs give off more yellow and orange light, starving leafy plants while they burn them.
Like plants growing outdoors in the sunlight, indoor plants grow best under full-spectrum bulbs.
The G8LED Mega LED Grow Light is perfect for indoor plants since it provides the full spectrum that they need, combined with massive coverage. It covers 18 square feet! For photoperiod plants, you can boost its performance during flowering by installing a few 90W red flower boosters. The buds that form will be huge and dense with cannabinoids.
As you can see, lights for growing weed can be complex – especially when you need to grow multiple plants or use photoperiod plants. You may have also noticed that many of the top 10 lights are LEDs, and it’s no surprise. LEDs offer superior energy efficiency, varied light spectrums, and a long life. Indoor growers of all experience levels know how well LEDs perform, which is why we offer a Light for Pot – Single Pot 75 Watt LED Grow Light in the Pot for Pot shop for those that choose to grow indoors. We also strongly recommend growing auto-flowers.
Kelvins refer to the warmth and color of the light being emitted. During the vegetative stage, cannabis thrives best when provided cool daytime blue light with approximately 6,400 kelvins. Conversely, flowering cannabis performs best with a warmer red light of 2,700 kelvins.
However, with an expected service life of only 10,000 hours, you will need to replace these lights a lot more frequently than LEDs.
The Sun System light emitting ceramic provides all the far frequencies of red light in addition to all the blue light, so your plants will have all the light needed to thrive and produce huge buds. This full spectrum is superior to what is provided by other lights currently on the market. The Sun System is also easy to set up and was designed to reduce the radiant heat generated by its arc tube.
Grow with the Sun.
What type of light is best for growing plants indoors?
In terms of coverage, the light from this LED panel can reach 7-8 square feet, so you can easily compute how many you’ll need based on the size of your indoor grow space. The Roleadro LED panel has an estimated service life of 50,000 hours, so they should last for a long time, and, like all other LED lights, this panel emits hardly any heat while working. That means, your plants are unlikely to experience light burn.
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.
This 12-band LED light is ideal for a variety of indoor plants, including weed. One of the best things about this light is the money you can save. When you replace other lights for growing weed with the Advanced Platinum Series LED light, you will immediately notice a drop in your energy use.
6. Lithonia Lighting GRW.
How do you know which lighting system is best for your situation? Well, you first need to know what you are looking for, and the best way to do that is by learning some key terms. This article will explain the fascinating features of lights for growing weed and list 10 of the best.
Grow Year Round.
As you can see, picking the best lights for growing weed is more than simply selecting the priciest model available. Especially if you are growing photoperiod plants, you should think about how many plants you are growing, where you will be growing them, and how much energy you can afford to spend.
Harvest up to a pound.
How do you maintain such a powerful light? Small inbuilt fans keep the lights cool and therefore eliminate the need for additional ventilation. Your plants will not suffer from light burn even though they are receiving plenty of light.
Whether you are growing a single plant, or a massive garden, LED lights are some of the best options around.
The fluorescent light tubes are also two feet long, so the four 24W tubes each provide double the amount of light that you can get from ordinary lights. The T5 is suspended from two points, making it easy to install or adjust relative to the size of your plants. This light system works very well for larger gardens because of how much space a single light can cover.
Lumens is a measure of how much light a given light source emits during each second the light is on. Like the light spectrum, lumens are more relevant for photoperiod plants. “Regular” cannabis plants require varying amounts of lumens during the different stages of growth. For example, they need between 2,500 and 5,000 lumens per square foot in the vegetative phase, but it jumps to 10,000 lumens per square foot during the flowering phase.
1.) Fluorescent Grow Lights.
2.) High Intensity Discharge (HID) Grow Lights.
Cons of Fluorescents.
More Light = Bigger Yields! (up to a point, it is possible to give your plant too much light!)
There are lots of options for grow lights that work well for growing cannabis indoors but in the end they boil down to 3 major types:
Note: Some growers may have heard of “Induction” grow lights, which are pretty rare these days but still pop up from time to time. There are two types: “Magnetic Induction” grow lights do okay for growing cannabis but they’re pretty much glorified fluorescent lights. “Plasma Induction” grow lights actually perform pretty poorly at growing cannabis.
These are actually just two names for the same thing. This type of metal halide bulb uses ceramic as part of the lamp just like an HPS. As a result, CMH bulbs are more efficient than regular MH lights (though still not as efficient as HPS bulbs).
Note: When shopping for LEDs, make sure they contain some amount of green or white (full spectrum) light. Plants grown without at least a tiny amount of green or white light are very prone to nutrient deficiencies and simply don’t grow as well. Learn more about how light spectrums affect cannabis growth!
T5 Grow Lights.
Some types of induction lights are well suited to stadium lighting but honestly they just aren’t that great for growing cannabis and they come with huge price tags. Even a lot of LEDs are cheaper and you’ll get better results with them. You can learn more about induction grow lights here.
There is a larger size MH/HPS grow light available (1000W), but at that size it starts going outside the scope of a “hobbyist” grower as far as ease and yields. In addition to needing a lot of extra cooling which costs electricity, a 1000W HPS grow light is less efficient compared to a 600W grow light (as far as how much light is put out for electricity used). I think most hobbyist growers would be happier with a 600W, or even two 600W lights, over a 1000W 🙂
CFL grow lights are the twisty-looking bulbs you can find anywhere you normally buy light bulbs. They produce a great spectrum for growing cannabis and can be used in tiny spaces where no other grow light would fit such as the inside of a cabinet.
Compare the Pros and Cons of Each Grow Light.
3 Main Classes of Marijuana Grow Lights.
LED grow lights are very popular among cannabis growers as an alternative to HPS grow lights. They tend to run cooler and also usually come with built-in cooling. They can often be plugged into a wall and simply hung over plants which is definitely easier than setting up an HID grow light. LEDs also have great penetration so they don’t need to be moved frequently like fluorescents.
HIDs are very well suited to growing cannabis and very easy to use once they’re set up. If your main goal is to get the highest yields possible, then HIDs are the way to go! However, they do require extra setup compared to the other grow lights because chances are you will need a fan to vent out heat from your grow space.
Fluorescents are a great choice for clones, young plants, supplemental lighting and can save you money on electricity in the vegetative stage compared to using high power lights when plants are too young to use it all anyway. They can also be used to flower plants in spaces that are shorter than what’s possible with other grow lights (aka ‘stealth growing’).
3.) LED Grow Lights.