New agricultural facilities such as greenhouses, plant factories, and vertical farms play an extremely important role in the development of modern agriculture. In order to avoid the adverse effects of weather and increase the yield, artificial lighting is used for plant supplement lighting. After years of development, LED grow lights have become the most important light source in agricultural lighting. Because of the lower price and high light efficiency, the high-pressure sodium (HPS) lamps still have a certain market share. The following is a comparison of the two most common agricultural lights currently on the market.
1. The HPS light is composed of mercury, sodium, neon arc tube wick, glass bulb, and getter lamp head. HPS lights of different powers need to use ballasts of corresponding specifications. The LED is also called a light-emitting diode, and the core portion is a wafer composed of a P-type semiconductor and an N-type semiconductor.
2. The HPS lamp tube has an illumination angle of 360°, and most of the light must be reflected by the reflector to reach the designated area. The spectral energy distribution is roughly red-orange, yellow-green, and blue-violet (only a small part). The LED light source has wavelength tunability, and can emit monochromatic light with narrow light waves, such as infrared, red, orange, yellow, green, blue, etc., and can be arbitrarily combined according to different needs.
3. The life of the HPS light is about 20,000 hours, which generates a lot of heat during work. As a semiconductor light source, LED grow lights can last up to 50,000 hours and produce relatively little heat, which can be installed close to crops.
4. Studies have shown that the gas exchange, chlorophyll content, accumulation of photosynthetic pigments, and transpiration rate are higher under LED lighting. The special spectral ratio of LEDs can also be used for the different growth of plants.
The advantages of HPS lights and LED lights are significant compared to other light sources. The initial investment cost of LED is higher than that of HPS lamps, but the overall cost is lower. And with the development of LED technology, the production cost of LED grow lights will further decrease.
I want to show my respect for your generosity giving support to those people that really need guidance on in this subject. Your personal commitment to getting the message all-around was incredibly advantageous and has consistently enabled women just like me to attain their aims. Your amazing useful instruction indicates much to me and further more to my colleagues. Thank you; from each one of us.
回复删除best led grow lights canada