Come with an extra female plug at the end of each set for the extension, the warm white and daylight one can be connected to up to 5 sets of light strings at a single run to fulfill different length requirements. Tips: For best-operating results, connect around 5 sets of the curtain light at a single run. Design with 320 quality LEDs, the LED window curtain light produces just the right amount of brightness that gives the brilliant illumination without upsetting your eyes. Daylight for a scatter