China manufacturer of magnetic ballasts for metal halide flood lights & hps flood lights

The efficiency of light source, light effect, the light flux consumption per unit of electricity issued, the unit is lm/W. Light effect is a very important indicator of road lighting. Because of the amount of light source used in road lighting, with high power consumption, the choice of efficient light source can greatly save energy. Incandescent although the price is cheap, but because the luminous efficiency is too low (below 20lm/W), has very little in the newly built road lighting use; high pressure sodium lamp efficiency due to the average more than 100lm / W, in road lighting is very popular; and a new type of light source, light emitting diode (LED) process with each passing day, light efficiency is getting higher and higher, power is bigger, has started application in landscape lighting, I believe that soon will be directly used for road lighting.

High pressure mercury lamp is a high-intensity gas discharge lamp, produced by mercury discharge high pressure obtained high luminous efficiency of a light source. Luminous efficiency is 40 ~ 60lm/W. Its advantages are high luminous efficiency, long life, high reliability. The disadvantage is poor color, is mainly used to be applied in road lighting, in China, the increase of trunk road due to road width, mercury lamp using less and less, roads and residential roads in general use, but in Japan, because the price advantage of mercury lamp can often be seen on the main road. Less use of the mercury lamp in landscape lighting, but high pressure mercury lamp although significant color index than metal halide lamp, compared with the latter, the lighting of the green plant, slant green color, so in plant landscape lighting, often can be seen using high pressure mercury lamp as the light source cast light or buried lamp sodium lamp is a gas discharge lamp, mercury lamp has a higher luminous efficiency. According to the difference of the sodium vapor pressure, there are also the points of low pressure and high pressure. Low pressure sodium lamp is lighting electric light source luminous efficiency was the highest (up to 200lm/W) of a light source, it is often used in road, elevated bridge, tunnel and intersections of color requirements is not high. Because of its poor color performance and short life, the application is far less than the high pressure sodium lamp. High pressure sodium lamp is a kind of high emission rate (up to 130lm/W) gas discharge lamp, due to its high luminous efficiency, long life, economy and can reduce mercury pollution in the environment, at present in the road, square, station, wharf, industrial sites large areas obtained the most widely used. Especially in landscape lighting lighting in the building, the source of high pressure sodium lamp is the most commonly used. Large yellow light, can be a good performance of the construction of a stable and generous style.

This color and brightness no other light source can replace the LED light bulbs, they use the solid semiconductor chip as a light-emitting material, when both ends with the forward voltage, the carrier in the semiconductor composite, the release of excess energy and cause the photon emission to produce visible light. LED has the advantages of high luminous efficiency, low power consumption, long service life, high resistance to vibration, fast response. The disadvantage is that the power can not be bigger, the price is expensive, and therefore can not be generalized as a light source. Previously used for indicating lamp, household appliances, car lights, traffic lights display etc.. In recent years, because of its long life, low maintenance workload; low power consumption, energy saving; better direction, to avoid light pollution; small volume, easy to conceal lamps and lanterns; fast response, easy to change control characteristics, in landscape lighting are very widely used, from the point light source, the United States resistant lamp to light digital tube, buried lights, cast light lamps involving almost all areas of traditional light source. There are also applications in road lighting, in Australia, there is a road lighting engineering examples, because of its high price and power constraints, the current use of a small range. LED due to the characteristics of its energy saving, is increasingly combined with solar energy devices, the composition of the most energy-efficient lighting facilities.