Intelligent control is one of advantages of LED lighting technology. LED power suppliers is a key point of LED intelligent control. Intelligent control have achieved obvious results in LED street lighting and LED tunnel lighting. Central controllers can switch on/off lamps or let them maintain in a certain energy consumption level depending on the density of vehicles on roads or in tunnels. These functions can be realized through all kinds of sensors and embedded systems. Intelligent control in one hand can make LED lighting technology more energy-saving and on the other hand can guarantee the safety of drivers by providing suitable light for drivers within tunnels. Research data demonstrated that tunnels using intelligent LED lighting system can reduce the accident rate by 2%.
Give up high power or supper power, replaced by more stable small-power suppliers. High-power LED circuits will generate more power. High working temperatures are a chief culprit of LED power suppliers’ failure. Relatively, small-power suppliers have been fully developed. They have more advantages in stability and production cost. As a matter of fact, most high-power designs have not been fully tested and verified. In another word, they are still in an immature state before getting to the market. Failures occurred frequently.
Cooling and protection is the main external factor for LED power suppliers’ failures. Not only that power suppliers themselves generate heat, lamps body can create heat also. How to conduct this heat into the air was always a big challenge for LED lamp designers. Within such limited space, it is very easy for heat to gather and form “heat island” effect. This will cause huge damages to power suppliers. Isolated circuit is a good solution for this problem.
The possibility of maintenance. Power failure is inevitable. The only way is simplifying the structures, making power replacement as easy as lamp body replacement.
Protection. Protection is another important aspect for LED lights. The penetration of moisture may cause short circuits. Dust on shells also affects the cooling effect of power suppliers. Exposure to sunlight results high temperature and aging circuits and electronic components. Experiments results show that rotating wiring plug has a higher failure rate, normally caused by moisture penetration.