After I turn off the switch the light remains on dimly, is this normal?

Thank you for reaching out. After being switched off, device is completely turned off. Based on the description, the issue might be due to a misconnection between the hot wire and neutral wire. However, please note that this is solely based on my personal experience. I highly recommend seeking the assistance of a professional technician for further diagnosis and repair. If there are any other questions, please do not hesitate to call our customer service number.