Number of Plants to Grow with Different Watts of Led Lights: Which is the Best Option?

People are always looking for new ways to make their food tastier. They want healthier, organic options that also cut down on cooking time and cost. However, some people worry about the environmental impact of going LED light-powered when they should really be using natural light sources like sun or candles in order to preserve energy.

The “how many plants can i grow with a 100w led light” is a question that has been asked many times. There are different factors to consider when deciding how many plants you want to grow, such as the size of your garden and if you want to use LED lights or traditional incandescent lights.

Plants need light to survive. However, the quantity varies depending on the lighting source and the environment. And the challenge becomes twofold when it comes to raising plants. 

This isn’t all- 

Even the tiniest error here may result in reduced yields and, in the worst-case scenario, dead plants. 

So, how many plants can you grow with various LED wattages?

This is dependent on a variety of factors, including the properties of your light. Such as PAR, PPFD, distance from the plant, light kind, and so on. In average, a 320w LED bulb grows roughly 6 plants. If your growing location and circumstances are different, this will change. We’ve discarded the lights depending on their kinds, intensities, development stages, and so forth.

Let’s go on to the next section and see what we’ve prepared just for you.

Mythbusting: How Accurate is a Metric ‘LED Watt’?

For growing plants, LED lights are regarded to be the best option. Especially if you’re just getting started with Seedlings. It uses less energy and generates less heat. Grow lights using HPS bulbs are also highly popular. HPS bulbs, on the other hand, create noises over time. As a result, LED lights have the highest efficiency. However, this is not always the case.

Watt is not the same as it appears on the label.

It is often assumed that a higher-wattage LED bulb would have a greater influence on plants. However, this is not the case. A 100 watt bulb will provide much less light than a 50 watt bulb for developing your plants. Electronic circuits create light in LED lights. The quality of this circuit varies depending on the manufacturer. The quantity of light that is generated also fluctuates. The following properties should be included in a high-quality LED bulb:

  • Color output that is consistent throughout the lifetime
  • For heat reduction, a thermal management system is used.
  • Conserving energy
  • Light is emitted in a 360-degree circle.

As a result, the wattage shown on the label does not always imply the amount of light produced.

Grow LED Impacts on Plants is defined by a number of other terms.

Some of the common terminology we use to figure out which bulb to purchase and how to utilize it are based on its measurements. These parameters are used to compute the quantity of light generated, the growth effectivity, and the light per area.

The following is a list of them:

MeasuresWhat does it mean?
LumenThis value is used to calculate the amount of light output by the bulb. The greater the lumen, the brighter the light.
PAR (Performance Assessment Rating) (Photosynthetic Active Radiation)The quantity of light that the plants can use. It is the photosynthetic wavelength utilized by plants. It’s a unit that’s used to quantify the absorbed wavelength in growth lights. 
PPFD PPFD PPFD PPFD ( Photosynthetic Photon Flux Density)The number of PAR photons that fall on a particular surface area per second. It’s your harvest. Every species has its own set of PPFD requirements. 
Wattage It is the quantity of energy that a bulb consumes. Varying kinds of bulbs have different wattages. A 13 watt CFL light, for example, is comparable to a 7 watt LED bulb. 

6 Ways to Understand the Plants in Number for X-Watt of LED

As you may be aware, the Plants in Number you may cultivate is determined by a variety of variables. However, the wattage, PAR (Performance Assessment Rating), grow space, and quantity of plants are all important considerations. Let’s look at the following part to observe how these variables change as a result of the causes.

The first of six methods is based on the growing style.

Varying development types need different levels of illumination. They are, however, all used to lower light levels than plants cultivated outside. Houseplants that flourish in low-light environments may also survive in ordinary room lighting. However, for outdoor growing plants, the ideal light is sunshine. It provides the highest efficiency for the kind of plant you’re growing.

How Many Different Growing Styles Do Growers Choose?

Plant development is influenced by a variety of growth patterns. However, only three are taken into account. They really are. 

  • SOG
  • SCROG, 
  • the style of the Grow Room

Each style’s wattage, as well as its PAR (Performance Assessment Rating) and the quantity of plants to grow, have been addressed.

Recommendation for ‘SOG Method’: Plants in Number-LED Watts

The “sea of green” strategy is also known as “SOG.” Growing a huge number of little plants at once rather than a few big ones is a low-stress method. The sea of green approach clusters several plants in close quarters under grow lights. As the plants develop together, they create a canopy of buds beneath the sun, giving birth to the so-called “sea of green.” This style need a variety of environmental elements in order to provide the best results. Correct pot size, light, pH-balanced water, soil, and so forth.

Many people use little pots of 4-8 liters to keep their plants from getting too tall. This is to avoid wasting valuable resources. Plants should be put in groups of 1-2 per square foot, preferably, and not too densely. When compared to a traditional grower, SOG farmers have a greater Plants in Number. They usually have 4-6 plants in the same location.

Every day, the plants need 18 hours of sunshine and 6 hours of pure darkness. It will be utilized to kickstart the phase of growth. The phase of growth will endure a lot shorter time than the other stages. They persist for around 4-6 weeks, or until the plants reach about 10-12 inches in height. When the plants reach about 6 inches in height, some gardeners begin the blooming period, which lasts around 2-3 weeks.

For the SOG growth style, the Capacity in Watts and PAR (Performance Assessment Rating) for a certain Plants in Number are shown below.

Capacity in Watts(mols/m2/sec) PAR (Performance Assessment Rating)Plants in Number
60 watts – 320 watts200 – 7002 to 4
320 – 450 watts750 – 300 6 to 8
600 w750 – 3008 to 10
1000w750 – 30010 to 12
1200 w 300 – 80012 to 14
2000w300 – 80020
3000w300 – 80030

Each plant should be the same size and have the same quantity of light needs. Once you reach the blooming stage, the light cycle will shift to 12 hours of light and 12 hours of darkness. The plants will be compelled to increase the size of their canopy. They concentrate all of their efforts and resources on the major cola. 

After the canopy has been erected, you may prune the branches underneath it. It is to prevent spending energy on the growth of side branches. In the future, these trims may be reproduced and utilized as clones. Finally, they’re ready to harvest.

Plants in Number-LED Watts Recommendation for ‘SCROG’

SCROG (Screen of Green) is a method for creating uniform horizontal canopies. The method spreads out the lower and higher branches in a uniform pattern. It is accomplished by lifting and lowering them. Cultivators may weave their way through the mesh with their branches. This will be accomplished by placing a screen over the growing medium. But, in SCROG, what screen measurement is best for light?

To accomplish so, use a drill and wood screws to link four 21-inch pieces of wood at a 90-degree angle. Make a square wood frame as best you can. At 2.5-inch intervals, screw eye hooks into the top of one side of the wooden square. To make a net of squares, tie lengths of thread through the small holes. Make sure the thread isn’t too tightly knotted so it may expand as your plants develop.

During the Vegetative period, the screen is put 20 cm above the base and maintained. When the screen is full, the light is altered in the 12/12 cycle to impact the blooming stage. For 2-3 weeks, the branches should be tucked and braided.

It’s important to remember that under the ScrOG technique, plant numbers are often smaller, with one plant per 2’x2′ area. Canopies bigger than 2’x2′ come from longer veg times. Canopies smaller than 2’x2′ come from shorter veg times. 

The use of screens facilitates plant training. As a consequence, the plants are short and bushy, with a lighting zone that is close to ideal.

Now you’re probably wondering, “How many plants can I grow with a 600 watt LED light?”

It all depends on how many plans you’re growing. However, a PAR value of 300 to 750 mols/m2/sec is suitable for a 600 watt LED light. And it’s for a total of eight plants.

Here are some extra watts and the wattage capacity for the SCROG technique of growing plants.

Capacity in Watts(mols/m2/sec) PAR (Performance Assessment Rating)Plants in Number
60 watts – 320 watts200 – 7004
320 – 450 watts750 – 300 
600 w750 – 300
1000w750 – 30010
1200 w 300 – 80012 
2000wBetween 300 and 105016 to 20
3000wBetween 300 and 105024 to 30

The ScrOG method significantly improves canopy aeration. Using a cloth container dramatically improves aeration of the growth medium. Pots for many plants should be 11 liters, while solitary plants should be 25 liters. Make sure the soil is totally dry before re-watering.

Plants in Number-LED Watts Recommendation for “Grow Room”

Lights, temperature, and humidity are all regulated in the grow room. A sophisticated grow room system also includes hydroponic systems for plant cultivation. It provides simple control and maintenance of lighting and humidity conditions.

A sealed ventilation system provides the environmentally regulated independence of a grow room. LED lights should be used to regulate the temperature in your grow space. For big areas, they are more energy-efficient.

The wattage capacity for the Plants in Number calculator is given below:

Capacity in WattsPAR (Performance Assessment Rating)Plants in Number
60 watts – 320 watts200 – 7004 – 6
320 – 450 watts750 – 300 6 – 8
600 w750 – 30010
1000wBetween 300 and 105010-14
1200 w Between 300 and 105014 -16
2000wBetween 300 and 105016 to 20
3000wBetween 300 and 105024 to 30

The second of the six methods is based on the Phase of Development.

LED lights can provide a broad spectrum of light. They also have a long lifetime and reduced heat waste and maintenance. Many farmers utilize LED lights to help with large-scale plant production. In all stages of development, certain spectrums have a significant impact on a plant’s physiology and morphology. LED grow lights have the potential to successfully increase growth at a precise point in the development cycle.

There are several stages of development that may be identified. It is accomplished by a plant’s various wattage and light requirements. The output of energy may also be simply evaluated. Its purpose is to increase crop yield while maintaining the ability to precisely check quality.

What Is the Number of Phase of Developments?

A plant’s growth is divided into many stages. Different phases react differently to wavelengths that aren’t in the PAR range. Among these, the most important are: 

  • Seedling 
  • phase of germination, 
  • phase of growth 
  • period of blossoming

A variety of factors influence the process of selecting the best PAR values. The genetics of the plant, its current development phase, and the environment are the most essential. A PAR meter may be used to determine the amount of PAR. They may be found in the table below.

Now, here’s our recommendation of PAR (Performance Assessment Rating) and Capacity in Watts for different phases of growth.

Phase of DevelopmentCapacity in WattsPAR (Performance Assessment Rating) (PPFD)Plants in Number
cloning / seeding60 watts – 450 watts100 – 3004 – 6
Vegetative320 – 600 watts250 – 6004 – 8
Flowering / Blooming320 – 600 watts Between 500 and 10504 – 8

However, depending on the LED bulb, this measurement may differ. The lumens per watt of personal LED grow lights will most likely be lower. It reduces their energy efficiency and lowers their yields. Many lights also lack a wide spectrum, with others having just blue and red light spectrums. 

The third of six methods is based on the kind of plant.

Various plant varieties need different types of bulbs. Greenhouses need the employment of LED grow lights to supplement the green light spectrum. Due to the availability of sunshine, it is preferable to cultivate entirely inside. So, let’s have a look at how LED lights affect various plant species.

Royal Cheddar is the first plant kind.

Rich, frosty buds are produced by the Royal Cheddar Fast Flowering strain. It takes as little as six weeks to complete the blossoming stage. It is one of the quickest photoperiods accessible. Many gardeners who love auto-flowering varieties have been won over by their wonderful shortness. This is due to their photoperiod strain’s abnormally high growth rate.

If you have a large enough grow tent, you can allow Royal Cheddar plants grow to a height of 100cm and create a lot of lateral growth. They have the ability to produce a single main monster cola as well as a bevy of secondary blooms. You may anticipate a yield of 450–500g/m2 after just 6–8 weeks of flowering. 

Easy Bud Type of Plant 2

Easy Bud is appropriate for both novice and seasoned gardeners. The easy bud approach is for individuals who desire several harvests of excellent Easy Bud buds in each season. Even yet, the strain’s rapid maturation will delight the eager grower. In the latter weeks of flowering, it exudes herbaceous Skunk odors.

It will keep its modest height as it grows, which is one of the reasons it can adapt to a variety of environments. Indoors, it’ll remain about 50–60cm tall, while outdoors, it’ll grow to 60–110cm tall. Indoors, these plants will give 275–325g/m2 and outdoors, 30–80g/plant.

Chile is a quick country. is the third plant kind.

Chile is a quick country. is another strain under the Royal Queen’s Fast Version trademark. This one blooms in about 6 weeks, which is extraordinarily quick. For Sea of Green configurations as well as continuous supply systems, Chile is a quick country. is a suitable alternative. This is due to the fact that it has a fast cycle and a structure that is uniformly active.

This is a little plant that grows to a height of 60–100 cm inside and 100–170 cm outdoors. The blooming season lasts just 6 weeks, and an average indoor harvest weighs 475-525 grams per square meter. As a result, it is recommended to cultivate the plant outside. Early September is when the harvest takes place. In that month, each plant produces 450-500 grams of high-quality buds.

The chart below shows the quantity of light required based on the amount of area required and the amount of yield.

Type of Plant Capacity in WattsPAR (Performance Assessment Rating) (PPFD)Plants in Number
Royal Cheddar320 – 450 watts750 – 300 4 – 8
Easy Bud320 – 450 watts750 – 300 8 – 12
Chile is a quick country.320 – 450 watts750 – 300 4 – 8

The fourth of six methods is based on the distance between the light source and the subject.

Various phases need varying distances from the light source. Moving the LED light closer to the plant is a good idea. When the plants begin to blossom and produce fruit, this should be done.

This allows the plant to get more light for photosynthesis and the growth of flowers and fruit. Your LED lights will bleach and produce yellow spots if they are placed too near to your plant.

In contrast to previous forms of grow lights, LED lights do not burn plants as much. Because they create less heat, this is the case. You should, however, use caution.

But how far away from my plant should my LED grow light be?

LED grow lights should typically be maintained 15 to 30 inches away from your plant. To keep a constant spacing, the distance should be changed with the plant’s development. Depending on the wattage of the light, the kind of LED, and the atmosphere, the distance may vary. However, greater wattage LED lights should be put farther away from the plant as a matter of thumb.

What Is the Importance of LED Light Source Distance?

For the greenhouse, light-emitting diodes (LED) lights are an excellent source of illumination. Despite the fact that LED lights release less heat, the distance between them and the plants might affect a variety of outputs. Plants may be burned by too much heat, resulting in burn patches. Less light will weaken the plan and result in a lower yield.

Because LED lights typically emit light that has both blue and red wavelengths. They’re ideal for early-stage plant growth. Also for when plants begin flowering and producing fruit. It’s because those stages of the plants’ life cycles need the most intense light and the light distance should be less. It is for optimal production of a Plants in Number.

How far should seedlings be exposed to LED light?

Seedling LED grow lights should be placed 25-36 inches above the plant canopy. This is determined by the light source’s wattage. The LED grow light should be placed 36 inches away from the seedlings. This is done to keep the heat and light intensity low and prevent drying out the plants. Later, the lights may be brought closer. But only once the roots have developed and the sprouting process has started (usually within the first 2-3 weeks).

When it comes to the vegetative stage, how far should LED light be used?

During the vegetative stage, LED grow lights should be set 11-25 inches apart from the top of the canopy. The light source should be put closer to the plants than it was during the seedling period. This is because photosynthesis requires more light at this stage.

For the Flowering Stage, How Far Should LED Light Be?

As the plants go through the flowering stage, their need for strong light decreases. The canopy’s highest leaves should be 18-24 inches from the light source to produce blooms. The plants begin to grow higher and produce fruit at this point. Changing the height of the lights during blooming is not necessary. This is dependent on the lighting and how tall you want your plants to grow, particularly if you don’t want them to be.

Way #5 of 6: Select LEDs Based on Their Type

The red and blue light spectrums have the highest photosynthetic efficiency. The wavelength of red light is around 700nm. It is one of the most efficient photosynthesis drivers. Particularly during the blooming period, when biomass increase is the most important. Plant development requires blue light at both the vegetative and flowering phases. However, it is mostly used to establish vegetative and structural development.

What hue light, on the other hand, is better for plant growth?

The kind of plant you intend to cultivate will decide the optimum color spectrum. As a result, the optimal hue is determined by the stage, the amount of light required, and the kind of plant. This may be rather challenging. It’s mostly for commercial growers that want to get the most out of their harvests. Plants can survive in a broad variety of wavelengths, but not all of them are required in equal quantities.

LED purple

LED purple combines red and blue wavelengths. It provides skin cleansing (blue) and anti-aging effects (red). Purple also helps to improve skin fitness and vitality. It is done by promoting cellular oxygenation and regeneration.

White LED

Cool white light, such as that with a color temperature of 6500K, contains more blue wavelengths. A warmer white light, such as one with a color temperature of 3000K, has more red wavelengths.

Blue Lights and Red Lights

The impact of blue light on plants is directly linked to the production of chlorophyll. Plants that get a lot of blue light will have robust and healthy stems and leaves. Red light, once again, promotes flowering and fruit development in plants. In the early stages of a plant’s life, it’s also required for seed germination and growth.

The sixth of six methods is based on the intensity of light.

The way plants utilize and absorb light differs from how humans perceive light intensity. This is why the light output of grow lights is measured. Plant cell growth and organ attachment are both influenced by light intensity.

Plant growth is affected by different light intensity at all stages. Plants don’t need a lot of light while they’re young. All that’s left is to provide the proper quantity of light to support plant development and germination. During the development of the plants, the light intensity must increase. This is crucial for the toughness and neatness of a seedling.

This table shows the intensity of a Plants in Number with Capacity in Watts.

Capacity in WattsThe level of difficulty (lux)Plants in Number
60 watts – 320 watts955lx2 – 4
320 – 450 watts1692lx4 – 8
600 w3663lx16
1000 w 8,500lx24

The PPFD is measured in micromoles per square meter per second (mol/m-2/s-1). As the light intensity, it is presented with the “light footprint” or canopy coverage (lux). A lumen meter may be used to precisely measure the lumen in your space. It will make your computations more straightforward than usual. Here’s our #1 recommendation for a lumen meter.

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 The intensity, PPFD/ PAR, and “light footprint” all change as the distance between the light source and the plant canopy expands or shrinks.

Is it possible to increase your light coverage?

The coverage area of a lamp is the area of the canopy that is illuminated by a beam of light. This is required for the relationship between the intensity of LED grow lights and their coverage area. The plant will get less coverage the farther away a light source is.

Assume you have a light hanging from your canopy at a distance of one foot. The gap between the hanging height and the ground is then raised to 2 feet. The light intensity will be lowered by a fourth as a consequence. This is why it is necessary to get insurance. The bigger your footprint, the greater the space between your lights and canopy. The lesser the light intensity, however, the better.

If you ask us, we already have some of the efficient LED bulbs for a Plants in Number in mind. Take a look below:

Your decision should always be based on the important elements we’ve discussed so far.


Here are some questions about which you may still be unsure. So go ahead and have a peek.

Is it possible to grow plants using regular LED lights?

Grow lights should not be utilized with regular LED lights. Despite the fact that they transmit some of the wavelengths that plants need. Plants need a lot of light, which isn’t provided by standard LED lights. Red and blue light are vital for plant development, and LED grow lights are intended to maximize them.

Plants need how many hours of artificial light?

Most edible species need 14 to 18 hours of light each day when cultivated under artificial illumination. Plants grown inside need more light hours than those grown outside. Don’t succumb to the temptation of leaving the lights on all day. For plants to grow, they require at least six hours of darkness each day.

Which light bulb mimics natural light the most?

Halogen bulbs are an incandescent bulb that emits “white light.” It’s a really accurate representation of natural light. Colors are more brilliant and the bulbs may be muted when using halogen illumination. They use a little less energy than incandescent bulbs. However, they are more costly and have a higher burn temperature.


That was all we had to say on a Plants in Number to grow with different watts of LED lights. There were a lot of ambiguous points in our article that needed to be clarified. We attempted to depict them as simply as possible. It’s a good idea to check to see whether your leaves are dying or changing color now that the LED light is in place. By this, you can be aware of any adverse effects on your plant beforehand.

Thank you so much for sticking it out with us to the finish. Use the comment box below to remain connected and keep us up to speed on your plant’s progress.

The “how many led watts for 4×8 grow tent” is a question that has been asked before. The answer to the question is 8,000 lumens or 2.4 watts per square foot.

Frequently Asked Questions

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