Is this batch of bulb is used in Mexico ? If it is used in Mexico, our other Mexico customers are using E26 lamp holder, preferably not to use 100-127V voltage, when other customers need 100-130V voltage, but the voltage difference between day and night is relatively large, lamp it is easy to damage, so we recommend customers in Mexico now all use 85-265V wide voltage stability, so that the light is much higher, rarely damaged phenomenon