LED lights with conventional high-pressure sodium lamps is different, high power LED street light with low voltage DC power supply, the power-type GaN-based blue LED with yellow phosphor synthesized efficient white light diodes, high efficiency, safety, energy saving, environmental protection, long life fast response, high CRI unique advantages, can be widely used in urban road lighting. Housing available PC pipe production, high temperature of 135 degrees, low temperature of -45 degrees. So how to buy LED lights?
1. Luminous efficiency
LED lighting technology matures, the power LED light source is required to meet the general street light flux. General high pressure sodium lamp luminous flux is 100LM / W, the commonly used high-power LED is 50-60LM / W, with the best LED chip abroad can reach 80LM / W, luminous efficiency is higher, which means better energy efficiency, which is Select the LED lights of the most important indicators. However, LED’s standards this has not been clearly defined, so when purchasing LED lights must be carefully confirmed.
2. LED street light failure
Now some businesses, in order to reduce costs, on the use of hundreds of small 0.5W power LED. However, this low-power LED light failure is very serious, the light fades to 80% of the life of only 1000 hours. So, as long-term use of the street needs is absolutely not allowed to use such small power LED, the choice of powerful LED (30W or more generally refers to), it would be much better light fades.
3. LED lights weight problem
LED lights, due to technical content, complex composition and other reasons, some of the high-power lamp will far exceed the weight of ordinary high-pressure sodium, so the corresponding support material requirements more higher. However, some manufacturers have LED lights LED lamp as much as possible to reduce the weight from the original single lamp about 30 kilograms, down more than 10 kg, weight reduction there is further downward trend.
4. LED lights heat
Because LED is a semiconductor components, and its chips affected by the temperature decreased to 30% of the initial luminous flux, illumination will lose significance, that is the end of life, in theory, high power LED street life of 3-5 million hours, but which is an important prerequisite for good heat dissipation. It is worth mentioning that the country has adopted the world’s leading manufacturers of needle cooling technology.