If you are into indoor gardening, you must use grow lights to provide the plants with the required light. But have you ever wondered how many lumens needed for grow lights? The answer is not as simple as you might think. This blog post will discuss how many lumens are needed for growing lights and the factors that affect the amount of light required. Stay tuned to learn more!

What is a Lumen?

The SI unit lumen measures the total amount of light emitted by a source. Luminous flux is measured in lumens. One lumen is the flux emitted by a standard candle (1/60th of an imperial ounce) burning at a rate of 540 grams per hour.

How Many Lumens Needed For Grow Light?

Grow Light

Plant growth is influenced greatly by light. Without light, plants will not grow and will eventually die. The intensity and type of light a plant receives are known as its illumination level.

  • Various types of light can be used for growing plants, including natural sunlight, fluorescent lights, HPS lights, and LED lights. The type of light you use depends on the plant you are growing and the environment in which it is being grown.
  • For example, fluorescent lights are best used to grow plants under artificial lighting because they emit a broad spectrum of colors which helps to mimic natural sunlight. HPS lights are perfect for growing plants in environments with low light levels because they produce more intense light than other types of LED lights.
  • Regarding growing lights, there are a variety of factors to consider. One of the most important is the number of lumens that the light emits. This article will explore how many lumens are needed for different plants and growing spaces.
  • Because no single answer is available, however, we can provide some general guidance. If you are growing plants indoors, you will need at least 500-1,000 lumens per square foot. You will need at least 2,000 lumens per square foot for outdoor plants.
  • Many factors can affect how many lumens your plants need. Everything from the type of plants to the growth stage and the grow area’s shape and size all play a role. You may need to experiment a little to find the right amount of light for your plants.
  • Divide the wattage of your grow light by the required lumen output to determine how many lumens you need to purchase. For example, a 600-watt HPS light needs at least 6800 lumens to work properly.
  • Be sure to research the different types of grow lights available before making a purchase. You will want to choose a light specifically designed for growing plants. The most popular grow lights are HID, LED, and T5 fluorescents.

What To Consider When Choosing A Grow Light?

How Many Lumens Needed For Grow Light

Remember a few things when choosing the right to grow light for your home or garden.

  • First and foremost, you’ll want to ensure that the light is powerful enough to provide the plants with the necessary light and nutrients.
  • Secondly, choosing a light that will fit your specific needs is important. Some lights are designed specifically for growing plants, while others can be used for general household lighting.

Here are some other things to consider when selecting a grow light:

  • The wattage of the light: A higher wattage means more intensity and power for your plants. However, ensure you don’t go overboard – too much wattage can harm your plants.
  • The type of bulb: Some grow lights use CFLs (compact fluorescent lamps), while others use HID (high-intensity discharge) bulbs. In terms of energy efficiency and lifespan, CFLs outperform HID bulbs. Choose based on cost vs. brightness vs. lifespan of fixture/lamp; consider if you will change bulbs often or want a longer-lasting lamp option.
  • The spectrum of light: Some lights emit a specific wavelength of light that benefits plants. Look for lights with a spectrum that includes the colors blue, green, and red.
  • The length of the cord: Make sure the cord is long enough so you can move the light around easily.
  • The type of socket: Most grow lights come with either an E26 or E27 socket. E26 sockets are used in Europe, while E27 sockets are used in North America.
  • The height of the light: The height of the light will determine how high up your plants can grow.

Once you’ve selected your grow light, read the manufacturer’s instructions carefully to ensure you’re getting the most out of your purchase.

What Are Some Common Grow Light Lumens?

What Are Some Common Grow Light Lumens

Different types of light fixtures are designed to produce different levels of light. A common grow light lumens rating is typically 600-1000. This means that a 600 lumen grow light will produce approximately 60-100 watts of energy, while a 1000 lumen grow light will produce approximately 100-300 watts.

What Are Some Factors That Affect How Many Lumens A Plant Needs?

Light intensity is one of the most important factors affecting a plant’s growth. But there are other factors, like the light spectrum that a light emits, the light’s distance from the plant, and how much light a plant needs to start making new growth.

Plants grow in direct response to the amount of light they receive. The number of lumens a plant needs will depend on its stage in its life cycle, its size, and the type of plant it is. For example, plants growing in the shade need fewer lumens than those growing in full sun. And plants that are actively growing (such as tomatoes or roses) need more lumens than plants that are resting (like ferns).

Several factors can affect how many lumens a plant needs:

Distribution Of The Light

Some lights have a wider range of colors than others, which means they can provide more total lumens over a wider range of wavelengths. This is great if you want to grow plants indoors under artificial lights because it allows you to adjust the intensity more easily.

Distance From The Source

The closer an object is to light, the more light it will emit. This is why a fluorescent light fixture is so close to the tube; because the light is coming from such close range, it emits many lumens.

Type Of Plant

Some plants need more red or blue light than others. For example, roses require more red light than other plants, and ferns need more blue light.

Growth Stage

Young plants need lots of lumens to start growing and developing their roots; as they grow, they need fewer and fewer lumens.

Once you have determined how many lumens your plant needs, there are several ways to provide that amount of lighting:

Use A Grow Light

A grow light is a special bulb that provides supplemental lighting for cannabis plants. Because of their size and cost, they may not be ideal for everyone.

Use an HID bulb

An HID bulb is similar to a grow light but produces a much brighter light beam. They’re smaller and less expensive than grow lights, which makes them more practical for smaller spaces.

Use an LED bulb

LEDs are becoming increasingly popular for supplemental lighting because they produce little heat and no noise (which can be disruptive when growing cannabis). They also last longer than other bulbs, so you won’t have to replace them as often.

Faq On How Many Lumens Are Needed To Grow Light

Can Any Led Light Be Used As A Grow Light?

The answer is no; not all LED lights can be used to grow plants. To be effective, LED grow lights need a specific spectrum conducive to plant growth. Certain LED lights are designed specifically for growing plants and tend to have a more balanced spectrum that includes red and blue light.

Are 800 Lumens Enough For Plants?

Total visible light emitted by an object is measured in lumens. For plants, 800 lumens is typically enough for adequate growth, but it may vary depending on the type of plant. Too little light can stunt plant growth, while too much can cause them to wilt.

How Many Lumens Do I Need For Indoor Plants?

The amount of lumens needed for indoor plants greatly depends on the type of plant, as well as the size and shape of the pot or container it is in. Generally speaking, a low light plant does not need more than 500 lumens, while a high light plant may need up to 2,000 lumens. It is always best to consult with a local nursery or greenhouse to get specific recommendations for the plants you are trying to grow.

What Color Led Is Best For Plants?

The wavelength of light that is best for plant growth is blue light. Blue light has a shorter wavelength than other light colors to penetrate further into the plant’s leaves. This is why most LED grow lights have a blue light LED.

Are 7000 Lumens Good For Plants?

Lumens are a measure of light intensity, so 7000 lumens measure the amount of light being emitted. This light intensity level is generally considered good for plants, as they need a certain amount of light to photosynthesize.


The amount of lumens needed for a grow light depends on the specific needs of the plants you are growing. Different types of plants require varying amounts of light, and it’s important to choose a grow light that can provide the right amount of lumens to meet their needs. By calculating the necessary lumens based on your plant’s light requirements and choosing the appropriate grow light, you can optimize your indoor gardening setup for healthy and thriving plants.