HOW TO EASILY FIND BAD CHRISTMAS LIGHT BULBS using a non contact voltage tester - YouTube
Fix Christmas Lights with the Pull of a Trigger (Not a Gun) – Patrick Ryan Lane
allsun Christmas Light String Tester Non Contact Voltage Finder Meter Light Bulb&Fuse Checker Gun 12-600 V AC Mini Light Repairing Tool, Blue: Amazon.com: Tools & Home Improvement
HOW TO FIX A STRING OF CHRISTMAS LIGHTS
How to Fix Christmas Lights
4 Easy Ways to Fix Christmas Lights That Are Half Out - wikiHow