What are the secrets of LED street light technology?

LED lighting project has attracted the government and enterprises attention, LED street light is currently the LED development priority among priorities, for the LED technology design, there are many ways and means of design, following by the TEK lighting  to tell you the LED street lamp technology secret.

 LED street light

 1, Why LED street light must choose constant current power supply?
The characteristics of LED lighting materials determine its environmental impact. As the temperature changes, the current of LED will increase with the increase of voltage. The current of LED will also increase Long exceed the rated current, will greatly shorten the service life of the LED street light. But LED is in constant temperature and voltage variations and other environmental factors, to ensure that the current value unchanged.

2, LED street lamp power constant current accuracy
Now, LED lighting power supply market popular error to achieve constant current accuracy is + 8%, constant current error is too large. And the general requirements of LED street light power supply constant current power supply is maintained at + 3%, that is a good product.


3, the working voltage of LED street light power supply.
Recommendations for general LED street lights . The working voltage is 3.0V. After testing, most of the work is in 3.2V, so it is reasonable to calculate by 3.2V


4, the working current of LED street light power supply should be how much is the most appropriate?
For example, LED's rated current is 350Ma, some factories began to design a 350 Ma with all the current will lead to heat lamps work seriously, after repeated contrast test shows that if the designed 320Ma effect is more ideal, can reduce the heat, let more electrical energy into visible light.


5, isolation or Non isolated.
General 15W isolated power supply because of its large size, making it very difficult to put into the LED street light power supply transformer cavity, thus depends on the specific circumstances, the general can only do 15W, little than isolated 15W, and the price is very expensive.

Especially visible isolation price is not cost-effective. Non isolated is mainstream and volume can do it even smaller(minimum can reach 8mm), in fact, the security measures of non isolated do well, and there is no problem. If space permits ,you can do isolated power supply.

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