Sunday, 24 July 2011

LED Plant Grow Light - Green Eco-Agriculture

Plants could not live without light, which is a necessary source of energy for plant growth. As is known to all, light play a role of readjustment on plant photosynthesis, growth & metabolism. Currently greenhouses are using fluorescent light, high-pressure sodium lamp & incandescent lamp etc, in order to compensate for the dearth of sunlight. The spectrum distribution of these lights is based on the demand of the human eye. But spectrum for plant growth & demand of eye is different. While LED source with plenty of type of wavelength, is suitable for lighting plant.


LED lighting source can be widely applied in plant cultivation, filling light for greenhouse, plant factory. It's advantage of promoting the growth of plants, playing an important regulatory role in some processes of morphogenesis, energy saving & environmental protection. Not only can release monochromatic light with narrower waves, such as red, orange, yellow, green, blue, infrared, etc, & can be freely combined according to different needs of plants & animals, but may also be closed to plant because it is a kind of icy light source with low calorific characteristic, improved space utilization. Moreover,LED plant growth lighting can provide reasonable biological environmental condition for crops, reducing use of chemicals, such as pesticides, hormones & etc., to make sure food safety. So it is a green light with low energy consumption.

Application testing testifies LED plant grow light wavelength is suitable for plant growing, blooming and fruition. Usually the growth of indoor plants will become worse as time goes on due to substantial lack of light. The LED light with spectrum lovely for plant grow, not only promotes plant growing, but also prolongs the blooming time and flowers quality. Using LED light in green houses and other agriculture facilities, will protect tomatoes, crumbles and other green house vegetable from flavor depreciation caused by light lack.

Different wavelengths of light makes different effects to plants' photosynthesis, the wavelength for plant photosynthesis requires is around 400-700nm or so. Light at 400-500nm (blue) and 610-720nm (red) makes the largest contribution for photosynthesis. Blue (470nm) and red (630nm) LED right can provide the necessary light to plants, so for LED plant lights it is ideal to make use of the combinations of these colors. In the visual effect, LED plant lamp with red and blue combination shows pink light. Blue light promotes green leaf grow; red light helps to flowing and bear fruit and also help to prolong the flowering period! The ratio for blue and red led of LED plant light is usually between 4:1 and 9:1, usually optional 4-7:1. When using the plant lamp to do the light supplement for plant,the general distance from light to blade is around 0.5 meters, continuous shine for12-16 hour's everyday can replace the sunshine .

Over the years, artificial lights chiefly used in plant field are high pressure sodium lamp, fluorescent lamp, metal halide lamp, & incandescent lamp, etc. Prominent disadvantages of these lights are large energy consumption & high operation cost, energy consumption alone accounts for 50%~60% of total operation cost. Therefore, to improve luminous efficiency & lower down energy consumption have always been the important issues regarding the application of artificial lighting in plant growing industry. According to statics of the Ministry of Agriculture, Tissue culture in China is now with a scale of twenty million square meters & an output value of three billion US dollars or so. With the continuous development of modern agriculture, demands of agricultural lighting also grow incessantly, yet followed by a substantial increase in power consumption. As the ideas of energy-saving keep filtering in to people's mind, the tremendous market potentials yet large energy consumption for agricultural lighting are not only great opportunities for the development & application of new agricultural lighting products, but also new challenges to the know-how of traditional agricultural lighting products.

Spark has been specializing in LED lighting products for over a decade. The newly-developed LED grow lights, based on the leading international semiconductor lighting theory, are specially designed for flowers & vegetables growing. With proper necessary spectrum needed for plant, Spark LED plant light can not only promote the growth of the plant & prolong their blooming spans, but can also improve their fruit quality & make definite the nice taste of green house vegetables. In addition, they are obtainable for out-of-season cultivation. These new series of plant lights are designed based on sunlight wavelength range & Flux needed for planting growing. With proper application, they can not only be used for plant cultivation in unfavorable growing surroundings, but even be able to speed up the breeding period & shorten the growing span, keeping off disease & deformity. Simultaneously, Spark & Cree have reached agreement on strategic cooperation on semiconductor lighting, which recommend that Spark's LED plant lights will all use high brightness Cree LED to make definite higher product quality & stability.

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