are christmas tree lights series or parallel

Christmas tree lights are usually wired in parallel, meaning that the current flows through each light bulb independently and that if one bulb fails, it will not affect the others. This setup is more reliable and easier to troubleshoot if a bulb fails or malfunctions. Additionally, parallel wiring allows for the use of a variety of bulb types and wattages, as long as the total wattage of the string does not exceed the maximum recommended by the manufacturer.