Everything You Need To Know About LED Lighting
2.LED stands for light-emitting diode.
A diode is an electrical device or component with two electrodes (an anode and a cathode) through which electricity flows - characteristically in only one direction (in through the anode and out through the cathode). Diodes are generally made from semi-conductive materials such as silicon or selenium - substances that conduct electricity in some circumstances and not in others (e.g. at certain voltages, current levels, or light intensities).
2.It`s really simple actually, and very cheap to produce, which is why there was so much excitement when LED lights were first invented!
When a light-emitting diode (LED) has a voltage source connected with the positive side on the anode and the negative side on the cathode, current will flow (and light will be emitted, a condition known as forward bias). If the positive and negative ends of the voltage source were inversely connected (positive to the cathode and negative to the anode), current would not flow (a condition known as reverse bias). Forward bias allows current to flow through the LED and in so doing, emits light. Reverse bias prevents current from flowing through the LED (at least up until a certain point where it is unable to keep the current at bay - known as the peak inverse voltage - a point that if reached, will irreversibly damage the device).
LED panel light,LED tube, led high bay light,led industry light Guangzhou Zhongzhinan Supply Chain Co.,Ltd. , https://www.gzzhongzhinan.com
1. Strengthen the dredging and disinfection of ponds Pond siltation is one of the main factors that limit fish production, and it is also an important cause of fish diseases. In particular, old fish ponds, dead water ponds, leaking water ponds and ponds with thick silt that have been cultivated for many years are required to use winter free time, pumping pool water, and after the sun exposure and freezing, excavation of thick silt, heightening reinforcement pond ponds . And use quicklime or bleach and Trichlorfon and other drugs to completely sterilize.
Second, do a good job of winter fish stocking work before and after the New Year and the Spring Festival is a good season for stocking, and winter transport of fish species due to low water temperature, fish scales close to facilitate fishing operations and transport, not easy to injury, high survival rate of culture.
Third, strengthen the production and management of fishes in winter (I) Production and management of open-air fish ponds
1, first of all to maintain a stable water level. In the winter and winter season, raising the water level and increasing the capacity of the water body can not only maintain a relatively stable water temperature, but also improve the water quality conditions. It is an effective measure to reduce the wintering mortality rate. General fish pond water level should be maintained at 1.8-2.0 meters.
2, adjust the water quality, enhance the body cold resistance. The general method is to take a lime slurry once every 15-20 days to increase the calcium concentration of the water body; during the winter, the water quality should be kept stable, and some water quality improvers and microbial agents are often used to adjust and improve the water quality and sediment quality.
3, adhere to the proper feeding in winter to improve fish physique. Feeding the feed properly during the winter, not only the fullness of the fish body, the body quality, etc. can maintain the normal level before the winter, but also the survival rate of the winter can be increased. The feed quality should be better, generally it is better to feed powdered cake or compound feed. The amount of feeding depends on the water temperature. When the water temperature is lower than 5°C, no feeding is required. When the water temperature is higher than 5°C, feed once in 4-5 days. The daily dosage is about 0.5% of the fish's body weight; the water temperature rises to 8 Above °C, the feeding amount should be increased appropriately, and the best choice for feeding is on sunny days.
(II) Management of Overwintering Fishes in Greenhouses
1, to maintain the water temperature stability: According to the different requirements of various fish temperature, good temperature control. For example, the soft-shelled turtle has the best growth environment at 30°C-32°C, indoor temperature requirement is controlled at 30°C-33°C, and the water temperature is stable at 31°C-32°C. Fish, such as tilapia and freshwater whitefish, should maintain the water temperature at the lower limit of their growth temperature. In general tilapia water temperature should be maintained at 18 °C -20 °C, fresh water, white pebbles, gemstones, etc. should be maintained at 22 °C -25 °C, and remain relatively stable, avoid sudden changes.
2, the regulation of water quality: (1) PH value to be controlled in the slightly alkaline, often use quicklime to adjust; (2) transparency to 25-35cm is appropriate, the water color yellow-green or tea-brown; (3) to maintain the appropriate dissolved oxygen: The soft-shelled turtle is mainly lung-breathing. It spends most of its life in the water and absorbs oxygen from the water by assisting its respiratory organs. If the long-term dissolved oxygen is insufficient, it may cause the low dissolved oxygen syndrome of the soft-shelled turtle, and the air compressor can be used to inflate the dissolved oxygen in the water. Tilapia and freshwater white fleas require higher dissolved oxygen, and should always keep dissolved oxygen above 4mg/l. (4) Changing water and pollution at a proper time: Changing the water discharge should be performed at a relatively high temperature during sunny days. The temperature difference when changing the water should not exceed 2°C, and the water change control should be 1/3 or 1/4 each time. Do not change the cold winter air as much as possible, it is recommended to use photosynthetic bacteria, EM bacteria, Bacillus and other beneficial microbial preparations to regulate water quality.
3. Proper feeding: Soft-shelled turtles are greatly affected by environmental changes. Generally, feeding should be controlled within 30 minutes, and daily feeding should be controlled at 2%-3% dry material; Tilapia and freshwater whitefish, gemstones. Extruded material, floating material-based, feeding a small amount of several times, feed control in the control of 0.5% - 1.5%.
IV. Actively Prevent Diseases Due to the lower water temperature in winter and winter, the immunity of the fish itself is reduced, and the disease resistance is weak. It is easily infected and invaded by pathogens and parasites. Aquaculture farmers must take strict preventive measures. Mainly to do regular water disinfection, regular feeding insecticide and disease-resistant baits. Antimicrobial drugs include lime, bleach, and bromochlorinated preparations. The internal medicines include vitamin C, oxytetracycline, florfenicol, viral spirits, and insecticides. They are alternately used for prevention to enhance fish immunity. The disease should be diagnosed correctly according to the symptoms, the right medicine should be prescribed, timely treatment should be performed, and fishery drugs should be used scientifically and reasonably.
LEDs are a simple invention with huge potential to change the lighting industry for the better. Don`t know much about them? Here are three big things you need to know to get your feet under you:
1.What Does LED Stand For?
2.A light-emitting diode is a semiconductor device that emits visible light when an electrical current passes through it. It is essentially the opposite of a photo-voltaic cell (a device that converts visible light into electrical current).
Did You Know? There is a similar device to an LED called an IRED (Infrared Emitting Diode). Instead of visible light, IRED devices emit IR energy when electrical current is run through them.
1.How Do LED Lights Work?
The p-type and n-type materials are created by introducing the original material to atoms of another element. These new atoms replace some of the previously existing atoms and in so doing, alter the physical and chemical structure. The p-type materials are created using elements (such as boron) that have less valence electrons than the intrinsic material (oftentimes silicon). The n-type materials are created using elements (such as phosphorus) that have more valence electrons that the intrinsic material (oftentimes silicon). The net effect is the creation of a p-n junction with interesting and useful properties for electronic applications. What those properties are exactly depends mostly on the external voltage applied to the circuit (if any) and the direction of current (i.e. which side, the p-type or the n-type, is connected to the positive terminal and which is connected to the negative terminal).
Application of the Technical Details to LED Lighting:
How to Manage Fish Breeding in the Winter Season
During the winter season, the temperature dropped significantly, and freezing weather sometimes occurred, while the fish were in the wintering season. In order to ensure the safe wintering of fish, local aquaculture farmers should be actively managed to manage the winter season.