120 w solar street light

Light, as can be seen everywhere in our daily life of large lighting appliances, because of the irradiation range, high brightness was deeply loved by people. Some use of high pressure sodium lamp light, lamps and lanterns, some use LED light source, who between them have more

light, as can be seen everywhere in the daily life of large lighting appliances, because of its wide exposure, high brightness and was deeply loved by people. Some high lamp, high-pressure sodium lamp is used, while others use led light source. Who has the edge between them? Which is better? These are all buyers very headache problem. Today, high lamp manufacturers of small series will tell everyone how to use the high lamp light source type. 1. First, high pressure sodium lamp has a yellow light color, low color warm color rendering index. Light color rendering index for 100, and the yellow color rendering index of high-pressure sodium lamp is only 20 or so. However, led light source color temperature can be 4000 - Choose between 7 million, color rendering index are also more than 80, more close to natural light in color. The white light of high pressure sodium lamp color temperature is about 1900 red. Due to high pressure sodium lamp is colored lights, color rendering is low, so; Color temperature; It is not practical for sodium lamp. 2. High pressure sodium lamp bulb start time is long, it takes time to restart the interval. It's about 5 - usually, reach normal brightness 10 minutes, restart the need more than 5 minutes. Led light source, however, did not start time long, can work at any time, easy to control. 3. For high pressure sodium lamp, light source, the utilization rate of only 40%, most of the light must pass a mirror reflection to illuminate to the designated area. Led light source, however, the utilization rate of about 90%, most of the light to direct exposure to the designated area, only a small part of the light need to shine by reflection. 4. The life of the ordinary high pressure sodium lamp is about 3000 - 5000 hours, and the life of the led light source is 30000 - 50000 hours. If the technology is more mature, the service life of the light emitting diode lamp can reach 100000 hours. To sum up, for high lamp, use led light source seems to be more beneficial. But we should also know that leds light penetrability is much less than the high-pressure sodium lamp, so in many areas for fog using high pressure sodium lamp is a better choice.