Zip file with Christmas Tree and Christmas String Lights for use with control pages for Devices. Heuristics set for "On" and "Off" states.
DISCLAIMER: I don't remember where I got the Christmas Tree images's, but I fairly certain I got them from this website, so not claiming those as original work.
The Christmas String lights are taken from a Google search, where I just desaturated the "Off" state, and left the "On" state colorized.
Place in /Library/Application Support/Perceptive Automation/Indigo 6/IndigoWebServer/images/controls
Let your conscience be your guide.