According to real simple there s an easy way to calculate how much string lighting is needed for any size christmas tree.
Best way to test christmas tree lights.
Now before you drape all those lights on your artificial christmas trees you may want to use.
Second test the christmas light bulbs with an inexpensive tester available where holiday lights are sold and online.
There s a way to test and fix the entire string of miniature lights without testing each bulb individually.
Test the bulbs start at the plug end.
Christmas light testers the most convenient way to test for faulty bulbs in a light string is through the use of a light tester.
Unpack your bulbs and plug them in to test they work before you put them on the tree.
You ll get a bright colorful look by adding one strand per foot of tree.
Testing the connections and wiring in fairy lights 1.
Usually changing a problem bulb or tightening it will fix the entire strand.
Check the fuse and wiring in the plug.
You can see how to wire a plug and test cables here 3.
Light testers search for the point in the string where the voltage changes between a good bulb with current flowing and a problem area with minimal current.