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For a 7-foot-tall column, choose a light strand that is at least 32 feet long. You’ll also need to measure the distance from the column to the closest outlet to get outdoor extension cords that are the right length.

Yes, you can synchronize Christmas lights with music to create a DIY light show. To do this, you will need several components. For hardware, you'll need standard holiday lights, decorations, lawn ornaments, tools, outdoor-rated extension cords, a computer, and a light show control system or digital controller. You will also need specialized software to program the show; popular options include Light-O-Rama (LOR), Vixen, xLights, and Animated Lights. Some, like Vixen and Animated Lights, are considered more beginner-friendly. The process involves using the software to program your lights, choosing an audio method such as speakers or an FM broadcast, and testing the entire system to make sure it's working correctly before the show.

You can take a few steps to prolong the life of your holiday lights. Make sure to replace burnt-out bulbs as quickly as possible to avoid overloading the rest of the circuit and knocking out more lights. Before packing them up each year, plug each strand into the wall to confirm everything is still working. Wrap the lights carefully back into their original packaging or something similar—winding a strand tightly together or leaving it to hang loose in a storage bin can lead to frayed or damaged wiring. 

If you only need strands in safe and easy-to-reach locations and are sure of your electrical system, you can probably purchase and install lights yourself. To do this, carefully test your outlets to ensure there aren’t any sparks or other concerning issues. Your budget might also influence this decision, as going the DIY route can be significantly cheaper.