Solar outdoor lamp1

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

high lamp as a ubiquitous large lighting in daily life, because of its wide exposure, high brightness and was deeply loved by people. Some high lamp, high-pressure sodium lamp is used, some use led light source. Who has the edge between them? Which is better? These are all very headache problem the buyer. Today, high lamp manufacturers of small editor told 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. Led light source color temperature, however, can be between 4000 and 7000 K, in any color rendering index are also more than 80, more close to natural light in color. For high pressure sodium lamp, the color temperature of the white light is about 1. 9 million. Because of the high pressure sodium lamp is light, its color is low. Color temperature. Sodium lamp no practical significance. 2. High pressure sodium lamp bulb start time is long, it takes time to restart the interval. In general, it takes about 5 - when the phone is switched on Need 10 minutes to reach normal brightness, again started more than five 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 be reflector before reaching the designated area reflection. When led light source utilization rate of about 90%, most of the light can direct exposure to the designated area, only a small part of the light need to shine by reflection. 4. The service life of the ordinary high pressure sodium lamp is about 3000 - The service life of 5000 hours, and 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. From what has been discussed above, it seems that the LED light source of light, more advantageous. However, we also need to know, the LED light penetrating far lower than that of high pressure sodium lamp. Therefore, in the rain and fog areas, the use of high pressure sodium lamp high lamp is a better choice.