How to Choose the Right LED Grow Light?

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How to Choose the Right LED Grow Light

Are you worried about how to choose the right LED grow light? We created this article to teach you how to choose the right LED grow light without any product advertising. You generally go through 3 steps to make a sound decision.

Step 1: Clarify your lighting needs

1) How big is your growing space?

How big is your growing space

The size and quantity of LED grow lights you buy will depend on the size of your growing area. For LED grow lights, the basic rule of thumb is 40 watts of real power per square foot of growing area. For example, if your growing space measures 20 square feet, you will need to purchase a grow light of approximately 800 watts.

2) What plants are you going to plant?

Growing different plant varieties requires different light intensity, spectra, and light exposure time in different growth stages. To be specific, light-requiring plants such as succulents require stronger light intensity and longer light time, and they also need ultraviolet light for coloring, while shade-requiring plants such as orchids require relatively less light.

3) Where will your LED grow lights be installed?

Take a look at your growing environment and think about what kind of installation method would be more friendly.

  • ceiling-mounted
  • Hanging
  • vertical (can be placed directly on the countertop or the ground)
  • free installation style (can be wall mounted or with clips for flexible positioning)

Step 2: Estimate the performance of the LED grow lights needed

1) Estimate how bright the grow lights you need should be.

There are two dimensions to evaluate the light intensity of grow lights. One is PPFD and the other is PPF. PPFD is the concept of optical density, which is related to area and position. PPF is the concept of total light amount, which is related to the basic physical properties of light. It is complex for ordinary users to understand PPFD. To make it simple, to estimate how bright a light you need, we can evaluate the PPF.

The evaluation method of PPF is straightforward. PPF=PPFD x used growing area. For example, your balcony has an area of 4 square meters for growing vegetables. Generally speaking, the PPFD range required by vegetables is 200-300. You can take the middle-value PPFD-250, then the PPF =250 X4=600μmol/S. So you can buy a grow light with a PPF of 600μmol/S.

2) Check whether the spectrum is suitable.

Check whether the spectrum is suitable.

Each plant type has unique behaviors and light requirements in different growth stages. Full spectrum lighting is necessary to grow robust plants. You’ll probably be unhappy with the outcome if you focus the light too much on one end of the spectrum. Using a light source composed of red and blue wavelength chips is inappropriate.

Selecting a full-spectrum grow light is advised. The ideal grow lights for your plants are full-spectrum grow lights since they mimic natural sunshine the closest. Natural sunlight emits light across all spectra, even ultraviolet and infrared rays invisible to the naked eye.

3) Evaluate how large an LED grow light suits your environment.

This size, width, and height can be evaluated. For example, if your balcony is 1 meter long, then the limit of the length of the grow lights you choose is 1 meter. Those longer than this length cannot be purchased. Although the excess part can be installed, it is outside the growing area. This portion of the light is wasted.

4) Do your LED grow lights need other features?

Do you need a timing function, an adjustable height function, a dimming function, a higher IP rating, or an automatic on/off function?

Step 3: Shop around and choose the one that suits you best

Shop around and choose the one that suits you best

Buying something is never the most expensive, best-performing, or cheapest, but the best that suits your needs. With the basic performance requirements, we can start to compare products.

Look at certification, quality assurance commitment, and supplier strength. If certified, it must be at least CE for Europe and UL for America. Products without basic certification will have certain safety risks and are not recommended for use. For warranty commitments and supplier strength, look at the warranty period and reviews. Anyone with shopping experience knows how to evaluate them.

About us

Casyoo is one of the leading LED light manufacturers with 17+ years of experience in this industry, including but not limited to LED grow lights. We partner with famous brands such as Samsung and Osram to deliver high-quality LED grow lights. Rest assured, all our LEDs have a 3-year warranty and acquire many certifications, such as UL, CE, and BSCL. Please feel free to reach out to us or check out our website to learn more about our products.

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Anne Zhang

Anne Zhang

Anne is a senior electronics engineer at Casyoo, a professional LED Lighting solutions manufacturer. With 10+ years of experience in the LED grow lighting industry, she aims to help growers and researchers around the world get a better understanding of LED grow light technology so as to increase their crop yields.
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