How to Choose a Best Led Grow Light

Many people may not have heard of led grow light, but it become more and more popular among growers all over the world. Led grow lights are widely used in plant tissue culture, the production of leafy vegetables, greenhouse fill light, plant factory, plant breeding, cultivation of medicinal plants, edible factory, algae culture, space fruits and vegetables, flowers planted, drive and kill mosquitoes. How to choose a best led grow light? At first, you need to know what is led grow light.
Led grow light Introduction

LED grow light is a kind of plant lights, it is LED (light emitting diode) as the light source, in accordance with the laws of plant growth need sunlight, use light instead of sunlight to create growth environment for plant. This kind of light has some effects such as promote root stout, promote plant growth, regulate flowering and color, promote fruit ripening and color, enhance the taste and quality.
How to choose a best led grow light

Light size

The best led grow light must be the most suitable one. The grow light that you choose should depend on how much area you want to cover. A small 100 watt light may cover 4 sq ft, while a large 400 watt light can cover up to 20 sq ft. Some growers recommend purchasing a larger light, because it is cheaper (watt for watt) and they can always back the light off from the plants if the light radiation is too intense. However, this will also reduce the PAR that reaches your plant so may not be ideal depending on the types of plants you are growing. A larger light will cover a larger area with more even and intense coverage than a smaller light that spreads the light over a greater distance.

Beam angle

In addition to the size of the LED grow light, the beam (or lens) angle matters too. A small angle (30 degrees) decreases coverage area, but delivers more PAR to your plants. A large angle (65 degrees) expands the overall light footprint, but reduces the light density delivered to the plants. You might consider larger angle lenses if the light is hung close to the plants. The coverage area will also vary between brands, by the size and shape of the grow light, and the LED wattage.

The chip

Most growth studies suggests that the best wattage for an LED chip is 3 watts. 3 watt LED chips possess the perfect balance between cost, size, and heat generation (or lack-there-of). The light energy that the 3 watt chips expel are able to penetrate up to 5 feet into the plant canopy, which is desired by most commercial growers. Houyi have some best led grow lights of 3 wattes, you can click the 3w series to have a look. There are still some best led grow lights which use CREE chip, such as HYG09-9*200W-W, cree chip led grow lights have higher lumen output than other lights, for more lights of this category, you can click the Cree Chips led grow light.

The cooling system

Choose an LED light that contain a metal core printed circuit board (MCPCB). These LEDs incorporate a base metal as a heat spreader and keeps the chips running at a lower temperature. This is important in extending the life of the LED. The LEDs should be mounted to a thick, finned, aluminum or copper heatsink. Most, if not all common LED grow lights on the market have this quality, so it should not be an issue when deciding on and LED grow light. Best led grow light usually contain internal cooling fans to rid any excess heat that may shorten the life of the diodes. Most of Houyi led grow light have fans, aluminum radiator system increase cooling area and intensity, better heat dissipation solution than other lights.


PAR, or photosynthetically active radiation, is a measure of photosynthetic light energy (400nm-700nm range) that falls on the plant each second. PAR does matter. It is important for plant growth, yet, many cheap PAR meters read the entire PAR range and not just the wavelengths required for photosynthesis.

Dimmable LED lights may be the way to go for adjusting PAR intensity. Dimmable LEDs also allow you to vary the light output without adjusting the height of the light and allow you to mimic seasonal light changes that some plants require. In addition to red and blue diodes, you may consider a light that contains UV wavelengths. UV light activates the plants defense mechanisms, affects plant development, growth, and metabolism. In summary, the best led lights for growing will include red and blue LEDs or a full-spectrum white light. UV diodes may be included to enhance a plant's physiological functions, but these are not required. You can click the led grow light full spectrum to find some Houyi best full spectrum lights.
How Do LED Grow Lights Work?
      It is a good idea understand the most fundamental question when looking to buy an LED grow light; LEDs create light through a phenomenon called electroluminescence, where electricity passing through a silicon semiconductor junction results in the creation of photons. Unlike every other grow lighting technology, LEDs do not require heat and/or mercury to create light for use in an LED grow light or other applications such as headlights for your car.

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