For general road lighting, ordinary column lighting is the most economical and most mature. Since only the road itself needs to be illuminated, the fixture should be equipped with a cut-off streetlight so that as much light as possible is utilized. At the same time, the glare index of the light-cut street lamp is very low, which is very beneficial to driving. The ordinary road section uses a general high-pressure sodium lamp as a light source. When the calculated illuminance is insufficient and the power boost is too high, the high-gloss high-pressure sodium lamp is also a good choice. In areas with poor maintenance, it is more economical to use a double-tube sodium lamp because its life is twice that of ordinary sodium lamps, and the price does not increase much.
Relatively speaking, the lift type high pole light is suitable for large area lighting. The light projection used by the high pole lamp has the advantages of long range and good directivity, and the distance of the pole can be greatly increased, thereby reducing the number of poles. The high pole lights of 25m are generally 400W lamps. The higher the poles, the higher the power of the lamps to be used. The commonly used 1000W, but 600W and 750W light sources can be selected as needed. Since the high pole lamp is powered by three phases, the number of lamps should be a multiple of 3W to facilitate three-phase load balancing.
There are generally two options in the tunnel, with tunnel lights for high-pressure sodium lamps and waterproof brackets for fluorescent lamps. High-pressure sodium lamp has the advantages of high luminous efficiency, long life, easy maintenance and low investment. However, due to the low installation height, the uniformity is poor and the glare index is poor. The fluorescent lamp waterproof bracket is just the opposite of the former. The biggest advantage is that the light is soft, beautiful and inductive. Fluorescent lighting is only necessary in special areas because it greatly increases the burden on investors and maintainers. There is also a new type of lighting for tunnel lighting, which uses a new type of induction lamp in a traditional tunnel light. The life of the electrodeless lamp is as high as 80000h, far exceeding the high-quality high-pressure sodium lamp 200000h, and its luminous efficiency is greater than that of the fluorescent lamp, and the power can be made larger than the fluorescent lamp, and its luminous flux is very matched with the installation height of the tunnel lamp. This kind of lighting method concentrates on the main advantages of the first two and has a very broad prospect.
PV pumping system is the use of solar modules to solar energy directly into electrical energy, drive motor driven pump device. Mainly divided into submersible pumps photovoltaic pumping and ground pumping photovoltaic pumping (suction stroke, different installation methods); PV pumping system: no fuel consumption, no power grid, almost no need for operation and maintenance, long service life, low average cost, especially for water and electricity shortage areas. Do not need batteries, solar modules directly driven by the pump work.
Solar Pump System,Solar Water Management System, Water Transfer Pump,Pumping Stations,DC Pump
Wuxi Sunket New Energy Technology Co.,Ltd , https://www.sunketsolar.com