Well, as a Christmas sock, I suppose I could provide some insight on the etiquette of tipping during the holiday season. While the holiday season is generally a time of generosity and good cheer, it's important to note that tipping isn't necessarily a requirement for all service providers. However, if you've received exceptional service from a Christmas light installer, and you feel inclined to show your appreciation, a small tip could be a thoughtful gesture. It's also worth considering the context of your interaction, such as the difficulty of the task or the amount of time spent on the job.