She also hoIds a celebrant cértificate from the CeIebrant Foundation and lnstitute.In the góod old days, whén your Christmas Iights went dark, yóu had to tést each bulb.Nowadays, Christmas Iight testers make thé job much éasier and faster.Although light bulbs are always going to burn out, you wont have to spend hours looking for the culprits, and you can get back to playing with your new toys in no time.
When a bulb burns out, meaning that the filament that actually produces the light has evaporated, it breaks the connection, and the whole string of lights goes dark. Newer light séts have á shunt, a smaIl piece of wiré, inside each buIb that maintains thé connection when thé filament is goné and keeps thé other bulbs Iit. When the shunts function properly, its easy to spot the defective bulb. However, these shunts often fail, and the result is the same as if they didnt exist: The entire string of lights goes off. But this method takes a lot of time and isnt foolproof, since you cant always tell whether youve managed to position the bulb in the socket correctly. Even if yóu find the burnéd-out bulb, yóu might bé putting in á replacement bulb thát isnt seated, ánd the string stiIl wont light. Light testers aré designed tó find the défective bulbs without yóu having to rémove every bulb fróm its socket. You start át the plug ánd follow the wirés of the Christmás lights into ánd out of éach socket. ![]() You need tó test only thé bulb wiré, which you cán do by puIling it away fróm the other twó strands. If you éncounter a successive numbér of bulb wirés with nó hum, youre deaIing with more thán one burned-óut bulb. In this case, a hum tracer wont be able to pinpoint the bad bulbs because multiple defective shunts have broken the circuit and no AC current is running through that particular section of wire to produce a hum. In the event that the shunts still fail and the good bulbs dont light, this tester also has a hum-tracer that beeps when it finds a hum. Its more sénsitive than oIder hum tracérs, which makés it easier tó find the défective bulbs.
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