How LED Grow Lights work


Using LED lights for your plants could be the wisest decision you make. LED stands for Light Emitting Diode. It was invented in the year 1927 by Oleg Losev. But it appeared as a usable electronic component only in the year 1962.

A diode is a very basic type of semiconductor device. The LED is a two-lead semiconductor light source. When an atom is missing electrons, an electron-hole is created. When an appropriate amount of voltage is applied to the leads in the LED, electrons recombine with the electron-holes and energy in the form of light is released. This effect is known as electroluminescence.

Light Wavelengths

In nature, plants receive sunlight which consists of the whole range of light wavelengths. This includes ultraviolet light and infrared light which are invisible to humans. Between these, there is violet, indigo, blue, green, yellow, orange and red light.

LEDs have recently been introduced to the area of Grow Lights. The exact wavelengths required for photosynthesis can be obtained from LEDs. There are many absorption peaks for chlorophyll and carotenoids. Multiple LED colors can be used in the LED grow light to cover these absorption peaks. An optimum mix of blue and red energy produced by LED lights is used for the better growth of plants.

Research shows that blue LEDs are preferred for vegetative growth, the wavelength of being in the mid-400 nanometer range. Red LEDs are preferred for growing flowers and fruits, with wavelengths between 600-640 nanometers. Using best LED grow lights, you can use more effective wavelengths for your plants. This means that you can avoid all the problems related to grow lights (heat, wasteful light) and jump straight to the benefits.

Energy Consumption

Earlier, low power LEDs were used as grow lights (1/3 to 1 watt). Nowadays, LEDs which are high power are being produced. 3 watt to 5 watt LEDs are common these days, with some LEDs exceeding 1200 watts. You should note that the watts that are mentioned on your product may be different from the actual watts required. Generally, the amount of power in watts that is mentioned on the product is the maximum power it can use.

The luminous efficacy of LEDs is higher than regular light sources like incandescent bulbs, i.e. for every watt consumed, more light is produced by LEDs compared to other light sources. Using LEDs reduces carbon emission.

Lifetime and failure of Full spectrum led

Full spectrum LED grow lights are subject to very little wear and tear, if operated correctly. It is important to operate LEDs at low heat and low current settings. Many LEDs made in the 1970s are still in use today. Lifetime typically quoted for LEDs ranges between 25,000 to 100,000 hours. Because of their longer life spans and lower energy consumption, they are economically sustainable. Most commonly, LEDs fail with a gradual loss light output. Sudden failures are rare.

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