Needless to say, the advantages of LED solar street lamp are those familiar keywords with high color rendering and long service life. High luminous efficiency, low maintenance rate, energy saving, environmental protection and no pollution. The renewal of traditional street lamps is the result that must be realized in the future. Now we are on the road of improvement. At present, the development of light efficiency technology has reached 120lm / W. its environmental and economic benefits make it possible for LED solar street lamps to replace traditional sodium lamps and metal halide lamps in the promotion of municipal projects. LED solar street lamp is the first choice for street lamp transformation.
The cracking caused by thermal expansion, cold contraction and internal stress is caused by the cover. If the material with nozzle material is selected, the internal stress of the material is difficult to remove, resulting in the easy cracking of the cover. Even if better materials are selected If the design and production process are unreasonable, it will also produce a lot of internal stress. Experienced landscape lamp manufacturers will choose constant temperature protection during injection molding to reduce the internal stress as much as possible, and adopt many physical methods to eliminate the internal stress. LED landscape lamp generally works outdoors. Due to the influence of temperature difference, its thermal expansion and cold contraction is the main reason for the cracking of the housing. At present, a better solution is to select materials with small thermal expansion and cold contraction coefficient Z.
The wire area used inside the LED landscape lamp shall be more than 1 square meter, and the material of the wire shall comply with the national standard. If the wire area is not enough or there are too many impurities in the material, the resistance value is large There is a large voltage difference between the front guardrail tube and the rear guardrail tube, so that the rear LED can work normally It is necessary to increase the input voltage, which virtually increases the power consumption. A lot of electric energy is not used to drive LEDs, but is wasted on wires and constant current chips. Therefore, the voltage difference is required to be no more than 15%, because the current general constant current chips have power consumption requirements, high voltage and high power consumption. If the power consumption is too large and the heat cannot be dissipated, the chip will be burned out.
