What’s HID grow light and What’re LED grow lights?
HID grow light
HID grow lights are the brightest and very efficient, but the price is also high. In the HID category, there are several types of bulbs: high pressure sodium lamp(HPS grow lights), metal halide lamp(MH grow lights), low pressure sodium lamp and mercury vapor lamp. Indoor gardeners need to worry about only high-pressure sodium lamps or metal halide lamps. The most common specifications are 400 watts and 1000 watts. The 400 Watt can provide enough light for a garden of about 15 square feet (1.4 square meters). A 1000Watt grow lamp can cover an area of about 4.5 square meters. For rapid growth, about 25 watts of HID grow lamps can be used for every 0.09 square meters.
The metal halide grow lamp is blue and white, which is conducive to the lush growth of leaves and keeping plants compact. It is best used as the main light source. A single bulb lasts about 10000 cumulative hours. (the bulb will continue to glow for more than 10000 hours, but the light will be reduced, so it is best to replace it before burning.) Metal halide lamps are also a lumen power supply. They produce up to 125 lumens per watt, while standard fluorescent lamps produce 39 lumens per watt and standard incandescent bulbs produce 18 lumens.
High pressure sodium lamp( HPS grow light) is red orange, which is most suitable for flowering plants. At the same time, it is also economical, because its average life is twice that of metal halide lamps. High pressure sodium lamps produce up to 140 lumens per watt. Their main disadvantage is that they do not produce light in the blue spectrum. If high-pressure sodium lamps are the only source of plants, plants will grow thin and long, which is not the type of plant most gardeners want.
How long the grow lights should be opened depends on the plant and its needs. Most plants and vegetables need about 10 to 12 hours of light a day to grow. Plants that produce fruit or flowers need more time: up to 16 hours a day.
LED grow light
LED plant grow lamp, using LED as the luminous body, can provide the necessary light conditions for plant photosynthesis in the absence of sunlight, so that plants can grow normally or better. LED grow lamps have the functions of strengthening roots, promoting, regulating flowering period and color, promoting fruit ripening and coloring, and improving taste and quality!
In recent years, the new LED plant grow lighting technology has developed rapidly. LED has many characteristics different from other electric light sources, which makes it the first choice of energy-saving and environmental protection light sources. Compared with the previous three similar products, Full spectrum LED grow light plant growth lights are more powerful and efficient, and the cost is lower. They can save electricity and generate less heat. Less heat can bring the plant lamp closer to the plant without worrying that the plant will be scorched. Because of this, LED plant lamps can effectively promote plants to grow better, so LED growth lights for plants are widely adopted throughout the world.
Led grow light also has the following characteristics: rich wavelength types, just consistent with the spectral range of plant light synthesis and light morphology; The half width of the spectral wave is narrow, which can be combined to obtain pure monochromatic light and composite spectrum as required; It can focus light of specific wavelength and irradiate crops evenly; It can not only regulate the flowering and Fruiting of crops, but also control the plant height and plant nutrients; The system has the advantages of less heating and small occupied space. It can be used in multi-layer cultivation three-dimensional combination system to realize low heat load and miniaturization of production space.
The advantages of LED grow light source are high luminous efficiency, long service life, safety and reliability, environmental protection and energy saving