Top 6 misconception about LED Grow Lights

2017-11-02 15:13:49 admin

Top 6 misconception about LED Grow Lights

Many people have a lot of misconception on the LED plant lights, Some problems with outdoor or indoor LED lamps are also applied to LED plant grow lights.

Our company summed up the following 7 points, hope to give you some references.

Misunderstanding# 1: lumens = photosynthesis

The so-called lumen is the physical unit that describes the luminous flux,the physics is interpreted as a candlelight (cd, candela candela, luminous intensity unit, equivalent to the luminous intensity of an ordinary candle) in a solid angle (radius of 1 meter on the unit ball, 1 square meter of the ball corresponding to the ball The angle of the cone, which corresponds to the central angle of the cross section of about 65 °).

Photosynthesis, that is, light energy synthesis, refers to the chloroplast containing green plants and certain bacteria, in the visible light irradiation, through the light reaction and carbon reaction (formerly known as dark reaction), the use of photosynthetic pigment, the carbon dioxide (or Hydrogen sulfide) and water into organic matter, and the release of oxygen (or hydrogen) biochemical process. There is also an energy conversion process that converts light energy into chemical energy in organic matter.

Measuring the light output of the led lamp is a necessary condition for the lighting industry. As the manufacturers of ordinary LED bulbs are mainly concentrated in the application of lighting, for humans, they will be very concerned about the specific lumen parameters.Some countries require led bulbs have a nominal lumen output.This method is used in the greenhouse to measure the brightness of the plant growth lamp, since it is generally available from the fixture manufacturer.

When it comes to led plant lighting, it is time to stop the requirements of lumen, and must begin to think about "Photosynthetic Photon Flux Density " (PPFD), it refers to the luminous flux density in the photosynthetically active radiation, which represents the amount of light quantum incident on the unit area per unit area in the wavelength range of 400 to 700 nm. This is a useful measure method for plants that are more useful than lumens. We need to measure the amount of light quantum flux per unit area to measure the amount of light under photosynthesis actually reach your plant.For almost all creatures in the biosphere, this process is the key to their survival. While the earth's carbon-oxygen cycle, photosynthesis is essential.

Misunderstanding# 2: from summer to winter, led grow light can be used for all seasons

A well-known gardening writer recently wrote such a news in an indoor gardening magazine:""The high pressure sodium lamp is very red and can mimic the autumn sunshine to guide the flowering."

And HID lamp sales staff said, metal halide lamp(HID) is the best plant lights, because "blue" like spring sunshine,the high pressure sodium(HPS) lamp, is the most conducive to flowering lights, because they like "red" lights.

Color temperature is a unit of measurement that represents the color component of the light. In theory, color temperature refers to the absolute black body from the absolute zero (-273 ℃) began to warm up after the color. Black body in the heat gradually from the black to red, turn yellow, white, and finally issued a blue light. When heated to a certain temperature, the black light emitted by the spectral components of the temperature is called temperature, the unit of measurement is "K" (Kelvin).

On the other hand, the sun's light will change over time throughout the day.Morning sunshine about 2000K (orange),at noon is 5000K,Sunset time back to 2000K or lower.In a sunny summer afternoon, the sky color temperature can be as high as 8,000-10,000K (blue).

Why is this so? As the interior gardener is taught,from "spring blue" to "falling red" will lead to flowering,in other words, will lead to plants from the vegetative growth stage into the flowering stage.This may be the impact of HID lights entering the interior garden very early.

Misunderstanding# 3: 90w LED grow lights can replace 400-600 watts HID lights

When the LED plant growth lights into the market in the first time, many manufacturers boldly claim that a 90 watt LED plant growth lamp can replace 400 or 600 watts HID well.These words sound like a myth, but it is really ridiculous.LED plant growth lamp manufacturers are usually very enthusiastic to prove their argument:For growing spinach or lettuce, LED plant lights do have a significant effect, but for light starry crops (such as tomatoes, cucumbers, herbs, or flowers) of this type of greenhouse plants, the effect is still lacking.These early 90-watt LED plant lights in fact the actual power of only 36-45 watts.With a few watt will be consumed in the power supply and cooling fan, these lamps actually produce less usable light compared to 100-250 watts of high pressure sodium lamp, 90W led plant lamp is impossible to directly replace 400- or 600W HID light.

Now everyone is already aware of this lesson. These days, most LED plant growth lamp manufacturers will provide real power and coverage for their lamps. LED plant light is indeed the traditional lighting effect of 1.5-2 times, but need to use the actual power of LED plant lights to end this myth.This requires LED plant growth lamp manufacturers to announce their lamp power at different heights of the micromolar value so that we, their customers, can according to the actual situation of the garden to decide how many LED lights to replace HID lights.

Misunderstanding #4:LED plant Grow Light produces little or no heat.

The most common marketing is that LED plants grow lights with little heat. When manufacturers claim that LED growers produce little heat, many growers buy, and then also provide a lot of photos, of course, LED plant growth lights produce less than HID growth lamp heat, but still heat, heat needs to be managed.

Misunderstanding# 5: LED lights do not burn plants

One of the biggest misconceptions about LED plant growth lights is that they will not burn your plants, no matter how close they are to your plants.This myth is based on the light output of the lower heat but the output of the more quantum light the better.Early LED growth lights, with their low output, are close to plants - such as fluorescent lamps, in some cases. Today's high-powered luminaires make it easy to approach plants.

LED plant growth lamp can cause photo-oxidation or "light bleaching".In this case, more light is absorbed, the part closest to the light is often part of the flower, because their chlorophyll is destroyed after the unfortunate turn white, LED and HID plant growth lamp can bleach the factory when used improperly, but The problem is not common with HID.

Misunderstanding #6: blue light to increase nutrition, red flowers only flowering

Read a lot of companies‘ introduction, claiming that Blue leds only adapt to vegetative growth, red light for flowering. There are some lights on the market that make this argument. And like the title"90w LED Grow light=400/600 watts" myth, this method may be applied to low light crops such as wheat grass, but in fact all plants need complete full spectrum grow light to normal growth.

Know about how specific wavelength work for your plant becomes more and more important .



Through the above explanation and analysis,you might know more about the LED Grow Light manufacturers/companyies .

Remember, you need to take a good look at the actual power consumption of LED plant lights ,what LED wavelength they use and then you may choose the suitable LED Plant Grow Lighting for your plants ,not just red and blue, their PPFD and coverage  grow area.

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