LED street light sudden don't light on this situation, in general is can check what's the problem, and deal with good, if not bright still happen after processing, this is we to the street lamp factory technical personnel to consult. LED lights suddenly not bright lights inspection method is as follows, first open the power distribution control cabinet, check the internal wiring. Whether line contact is good, whether cable rupture. Sometimes bad distribution line contact and broken cable can cause the overall road lights LED does not light. Second, check the wear condition of buried cable, see if there is a case of fracture damage. At the same time, also want to check the cable waterproof, some buried cable waterproof performance is poor, short circuit happens under the influence of water lead to outdoor LED street lamp not bright lights. Meet these situations, often change the buried cable. Third, LED street lamp open, check the internal heat sink, the LED chip and power drive. Heat radiator damage will cause LED street lamp head is too high, burn out internal wiring, so that it is not bright lights. Power driver controls the voltage and current, if the measured current and voltage is too big or too small, that will lead to the LED street lamp not bright lights, at this time to replace a new drive power. Of course this happens the better solution is to return to the street lamp manufacturers, and ask them to provide a new LED street light head. Want to learn more industry information or ask price, can call advisory